78815201355 has 96 divisors (see below), whose sum is σ = 164660221440. Its totient is φ = 34401776640.

The previous prime is 78815201351. The next prime is 78815201371. The reversal of 78815201355 is 55310251887.

78815201355 is a `hidden beast` number, since 7 + 88 + 15 + 201 + 355 = 666.

It is not a de Polignac number, because 78815201355 - 2² = 78815201351 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 78815201355.

It is not an unprimeable number, because it can be changed into a prime (78815201351) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10065 + ... + 397154.

It is an arithmetic number, because the mean of its divisors is an integer number (1715210640).

Almost surely, 2^78815201355 is an apocalyptic number.

78815201355 is an abundant number, since it is smaller than the sum of its proper divisors (85845020085).

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

78815201355 is a wasteful number, since it uses less digits than its factorization.

78815201355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407281 (or 407278 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The spelling of 78815201355 in words is "seventy-eight billion, eight hundred fifteen million, two hundred one thousand, three hundred fifty-five".