78585857930 has 32 divisors (see below), whose sum is σ = 146623478400. Its totient is φ = 30290005312.

The previous prime is 78585857893. The next prime is 78585857939. The reversal of 78585857930 is 3975858587.

It is not an unprimeable number, because it can be changed into a prime (78585857939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123500 + ... + 415239.

It is an arithmetic number, because the mean of its divisors is an integer number (4581983700).

Almost surely, 2^78585857930 is an apocalyptic number.

78585857930 is a deficient number, since it is larger than the sum of its proper divisors (68037620470).

78585857930 is a wasteful number, since it uses less digits than its factorization.

78585857930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539278.

The product of its (nonzero) digits is 84672000, while the sum is 65.

The spelling of 78585857930 in words is "seventy-eight billion, five hundred eighty-five million, eight hundred fifty-seven thousand, nine hundred thirty".