79621249914 has 20 divisors (see below), whose sum is σ = 178410578874. Its totient is φ = 26540416584.

The previous prime is 79621249891. The next prime is 79621249937. The reversal of 79621249914 is 41994212697.

79621249914 is a `hidden beast` number, since 7 + 9 + 621 + 2 + 4 + 9 + 9 + 1 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (79621249891) and next prime (79621249937).

It can be written as a sum of positive squares in only one way, i.e., 44789373225 + 34831876689 = 211635^2 + 186633^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 245744437 + ... + 245744760.

Almost surely, 2^79621249914 is an apocalyptic number.

79621249914 is an abundant number, since it is smaller than the sum of its proper divisors (98789328960).

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

79621249914 is a wasteful number, since it uses less digits than its factorization.

79621249914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491489211 (or 491489202 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 79621249914 in words is "seventy-nine billion, six hundred twenty-one million, two hundred forty-nine thousand, nine hundred fourteen".