51862196640 has 48 divisors (see below), whose sum is σ = 163365920928. Its totient is φ = 13829918976.

The previous prime is 51862196627. The next prime is 51862196641. The reversal of 51862196640 is 4669126815.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 51862196640.

It is not an unprimeable number, because it can be changed into a prime (51862196641) 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, 54022642 + ... + 54023601.

It is an arithmetic number, because the mean of its divisors is an integer number (3403456686).

Almost surely, 2^51862196640 is an apocalyptic number.

It is an amenable number.

51862196640 is an abundant number, since it is smaller than the sum of its proper divisors (111503724288).

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

51862196640 is a wasteful number, since it uses less digits than its factorization.

51862196640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108046261 (or 108046253 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 51862196640 in words is "fifty-one billion, eight hundred sixty-two million, one hundred ninety-six thousand, six hundred forty".