78494687355 has 32 divisors (see below), whose sum is σ = 146462400000. Its totient is φ = 35883283296.

The previous prime is 78494687321. The next prime is 78494687399. The reversal of 78494687355 is 55378649487.

It is not a de Polignac number, because 78494687355 - 2⁶ = 78494687291 is a prime.

It is a super-2 number, since 2×78494687355² (a number of 23 digits) contains 22 as substring.

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, 7623105 + ... + 7633394.

It is an arithmetic number, because the mean of its divisors is an integer number (4576950000).

Almost surely, 2^78494687355 is an apocalyptic number.

78494687355 is a deficient number, since it is larger than the sum of its proper divisors (67967712645).

78494687355 is a wasteful number, since it uses less digits than its factorization.

78494687355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15256528 (or 15256514 counting only the distinct ones).

The product of its digits is 203212800, while the sum is 66.

The spelling of 78494687355 in words is "seventy-eight billion, four hundred ninety-four million, six hundred eighty-seven thousand, three hundred fifty-five".