51887501831591 has 16 divisors (see below), whose sum is σ = 52546461488640. Its totient is φ = 51229355548800.

The previous prime is 51887501831531. The next prime is 51887501831593. The reversal of 51887501831591 is 19513810578815.

It is a cyclic number.

It is not a de Polignac number, because 51887501831591 - 2⁶ = 51887501831527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887501831593) 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, 1236308255 + ... + 1236350223.

It is an arithmetic number, because the mean of its divisors is an integer number (3284153843040).

Almost surely, 2^{51887501831591} is an apocalyptic number.

51887501831591 is a deficient number, since it is larger than the sum of its proper divisors (658959657049).

51887501831591 is a wasteful number, since it uses less digits than its factorization.

51887501831591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51286.

The product of its (nonzero) digits is 12096000, while the sum is 62.

The spelling of 51887501831591 in words is "fifty-one trillion, eight hundred eighty-seven billion, five hundred one million, eight hundred thirty-one thousand, five hundred ninety-one".