23436778464 has 756 divisors, whose sum is σ = 83743010568. Its totient is φ = 6435728640.

The previous prime is 23436778433. The next prime is 23436778499. The reversal of 23436778464 is 46487763432.

23436778464 is a `hidden beast` number, since 2 + 3 + 436 + 77 + 84 + 64 = 666.

It is a super-2 number, since 2×23436778464² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 23436778464.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 1018990357 + ... + 1018990379.

It is an arithmetic number, because the mean of its divisors is an integer number (110771178).

Almost surely, 2^23436778464 is an apocalyptic number.

23436778464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23436778464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41871505284).

23436778464 is an abundant number, since it is smaller than the sum of its proper divisors (60306232104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23436778464 is a wasteful number, since it uses less digits than its factorization.

23436778464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 58 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 54.

The spelling of 23436778464 in words is "twenty-three billion, four hundred thirty-six million, seven hundred seventy-eight thousand, four hundred sixty-four".