79630871858 has 4 divisors (see below), whose sum is σ = 119446307790. Its totient is φ = 39815435928.

The previous prime is 79630871807. The next prime is 79630871909. The reversal of 79630871858 is 85817803697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85817803697 = 15907 ⋅5394971.

It is an interprime number because it is at equal distance from previous prime (79630871807) and next prime (79630871909).

It can be written as a sum of positive squares in only one way, i.e., 75140129689 + 4490742169 = 274117^2 + 67013^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 79630871858.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19907717963 + ... + 19907717966.

Almost surely, 2^79630871858 is an apocalyptic number.

79630871858 is a deficient number, since it is larger than the sum of its proper divisors (39815435932).

79630871858 is a wasteful number, since it uses less digits than its factorization.

79630871858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39815435931.

The product of its (nonzero) digits is 20321280, while the sum is 62.

The spelling of 79630871858 in words is "seventy-nine billion, six hundred thirty million, eight hundred seventy-one thousand, eight hundred fifty-eight".