78292257630 has 16 divisors (see below), whose sum is σ = 187901418384. Its totient is φ = 20877935360.

The previous prime is 78292257601. The next prime is 78292257643. The reversal of 78292257630 is 3675229287.

It is a super-2 number, since 2×78292257630² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 1304870931 + ... + 1304870990.

It is an arithmetic number, because the mean of its divisors is an integer number (11743838649).

Almost surely, 2^78292257630 is an apocalyptic number.

78292257630 is an abundant number, since it is smaller than the sum of its proper divisors (109609160754).

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

78292257630 is a wasteful number, since it uses less digits than its factorization.

78292257630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609741931.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 78292257630 in words is "seventy-eight billion, two hundred ninety-two million, two hundred fifty-seven thousand, six hundred thirty".