78491263356 has 96 divisors (see below), whose sum is σ = 233679532800. Its totient is φ = 22533370560.

The previous prime is 78491263351. The next prime is 78491263387. The reversal of 78491263356 is 65336219487.

78491263356 is a `hidden beast` number, since 78 + 491 + 2 + 6 + 33 + 56 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78491263351) 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 31 ways as a sum of consecutive naturals, for example, 1716115 + ... + 1761258.

It is an arithmetic number, because the mean of its divisors is an integer number (2434161800).

Almost surely, 2^78491263356 is an apocalyptic number.

78491263356 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78491263356 is an abundant number, since it is smaller than the sum of its proper divisors (155188269444).

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

78491263356 is a wasteful number, since it uses less digits than its factorization.

78491263356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477416 (or 3477408 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 78491263356 in words is "seventy-eight billion, four hundred ninety-one million, two hundred sixty-three thousand, three hundred fifty-six".