18360778410 has 128 divisors (see below), whose sum is σ = 54546912000. Its totient is φ = 4363704576.

The previous prime is 18360778369. The next prime is 18360778417. The reversal of 18360778410 is 1487706381.

It is a super-2 number, since 2×18360778410² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18360778417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11601 + ... + 191979.

It is an arithmetic number, because the mean of its divisors is an integer number (426147750).

Almost surely, 2^18360778410 is an apocalyptic number.

18360778410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18360778410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27273456000).

18360778410 is an abundant number, since it is smaller than the sum of its proper divisors (36186133590).

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

18360778410 is a wasteful number, since it uses less digits than its factorization.

18360778410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180437 (or 180431 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 18360778410 in words is "eighteen billion, three hundred sixty million, seven hundred seventy-eight thousand, four hundred ten".