51860669454 has 72 divisors (see below), whose sum is σ = 123611604480. Its totient is φ = 15702223680.

The previous prime is 51860669437. The next prime is 51860669479. The reversal of 51860669454 is 45496606815.

51860669454 is a `hidden beast` number, since 5 + 186 + 0 + 6 + 6 + 9 + 454 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51860669454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2776354 + ... + 2794970.

It is an arithmetic number, because the mean of its divisors is an integer number (1716827840).

Almost surely, 2^51860669454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51860669454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61805802240).

51860669454 is an abundant number, since it is smaller than the sum of its proper divisors (71750935026).

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

51860669454 is a wasteful number, since it uses less digits than its factorization.

51860669454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19926 (or 19912 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 51860669454 in words is "fifty-one billion, eight hundred sixty million, six hundred sixty-nine thousand, four hundred fifty-four".