87752605631 has 2 divisors, whose sum is σ = 87752605632. Its totient is φ = 87752605630.

The previous prime is 87752605621. The next prime is 87752605639. The reversal of 87752605631 is 13650625778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87752605631 - 2¹⁸ = 87752343487 is a prime.

It is a super-2 number, since 2×87752605631² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87752605631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87752605639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43876302815 + 43876302816.

It is an arithmetic number, because the mean of its divisors is an integer number (43876302816).

Almost surely, 2^87752605631 is an apocalyptic number.

87752605631 is a deficient number, since it is larger than the sum of its proper divisors (1).

87752605631 is an equidigital number, since it uses as much as digits as its factorization.

87752605631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 87752605631 in words is "eighty-seven billion, seven hundred fifty-two million, six hundred five thousand, six hundred thirty-one".