1229378116464 has 160 divisors (see below), whose sum is σ = 3737226516480. Its totient is φ = 385596288000.

The previous prime is 1229378116453. The next prime is 1229378116471. The reversal of 1229378116464 is 4646118739221.

1229378116464 is a `hidden beast` number, since 1 + 2 + 2 + 93 + 7 + 81 + 16 + 464 = 666.

It is a super-2 number, since 2×1229378116464² (a number of 25 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 1229378116464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35461539 + ... + 35496189.

It is an arithmetic number, because the mean of its divisors is an integer number (23357665728).

Almost surely, 2^{1229378116464} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1229378116464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868613258240).

1229378116464 is an abundant number, since it is smaller than the sum of its proper divisors (2507848400016).

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

1229378116464 is a wasteful number, since it uses less digits than its factorization.

1229378116464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39516 (or 39504 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 1229378116464 in words is "one trillion, two hundred twenty-nine billion, three hundred seventy-eight million, one hundred sixteen thousand, four hundred sixty-four".