51380087886 has 16 divisors (see below), whose sum is σ = 114177973200. Its totient is φ = 17126695944.

The previous prime is 51380087881. The next prime is 51380087893. The reversal of 51380087886 is 68878008315.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 951483109 = 51380087886 / (5 + 1 + 3 + 8 + 0 + 0 + 8 + 7 + 8 + 8 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51380087881) 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, 475741501 + ... + 475741608.

It is an arithmetic number, because the mean of its divisors is an integer number (7136123325).

Almost surely, 2^51380087886 is an apocalyptic number.

51380087886 is an abundant number, since it is smaller than the sum of its proper divisors (62797885314).

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

51380087886 is a wasteful number, since it uses less digits than its factorization.

51380087886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951483120 (or 951483114 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 51380087886 in words is "fifty-one billion, three hundred eighty million, eighty-seven thousand, eight hundred eighty-six".