79765641500 has 48 divisors (see below), whose sum is σ = 174605471040. Its totient is φ = 31833489600.

The previous prime is 79765641493. The next prime is 79765641509. The reversal of 79765641500 is 514656797.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79765641509) 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, 37802 + ... + 401198.

It is an arithmetic number, because the mean of its divisors is an integer number (3637613980).

Almost surely, 2^79765641500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79765641500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87302735520).

79765641500 is an abundant number, since it is smaller than the sum of its proper divisors (94839829540).

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

79765641500 is a wasteful number, since it uses less digits than its factorization.

79765641500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363855 (or 363843 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 79765641500 in words is "seventy-nine billion, seven hundred sixty-five million, six hundred forty-one thousand, five hundred".