78077578004 has 24 divisors (see below), whose sum is σ = 144634496160. Its totient is φ = 36816048864.

The previous prime is 78077577989. The next prime is 78077578043. The reversal of 78077578004 is 40087577087.

It is a happy number.

It is a super-3 number, since 3×78077578004³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7821554 + ... + 7831529.

It is an arithmetic number, because the mean of its divisors is an integer number (6026437340).

Almost surely, 2^78077578004 is an apocalyptic number.

It is an amenable number.

78077578004 is a deficient number, since it is larger than the sum of its proper divisors (66556918156).

78077578004 is a wasteful number, since it uses less digits than its factorization.

78077578004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15653159 (or 15653157 counting only the distinct ones).

The product of its (nonzero) digits is 3073280, while the sum is 53.

The spelling of 78077578004 in words is "seventy-eight billion, seventy-seven million, five hundred seventy-eight thousand, four".