7901798136 has 32 divisors (see below), whose sum is σ = 19816831440. Its totient is φ = 2625621248.

The previous prime is 7901798131. The next prime is 7901798137. The reversal of 7901798136 is 6318971097.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7901798131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511701 + ... + 526916.

Almost surely, 2^7901798136 is an apocalyptic number.

It is an amenable number.

7901798136 is an abundant number, since it is smaller than the sum of its proper divisors (11915033304).

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

7901798136 is a wasteful number, since it uses less digits than its factorization.

7901798136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038943 (or 1038939 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 7901798136 is about 88892.0589029189. The cubic root of 7901798136 is about 1991.7827963526.

The spelling of 7901798136 in words is "seven billion, nine hundred one million, seven hundred ninety-eight thousand, one hundred thirty-six".