78077578002 has 32 divisors (see below), whose sum is σ = 165354296832. Its totient is φ = 24492920064.

The previous prime is 78077577989. The next prime is 78077578043. The reversal of 78077578002 is 20087577087.

It is a super-2 number, since 2×78077578002² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1670868 + ... + 1716960.

It is an arithmetic number, because the mean of its divisors is an integer number (5167321776).

Almost surely, 2^78077578002 is an apocalyptic number.

78077578002 is an abundant number, since it is smaller than the sum of its proper divisors (87276718830).

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

78077578002 is a wasteful number, since it uses less digits than its factorization.

78077578002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62722.

The product of its (nonzero) digits is 1536640, while the sum is 51.

The spelling of 78077578002 in words is "seventy-eight billion, seventy-seven million, five hundred seventy-eight thousand, two".