87961802031 has 24 divisors (see below), whose sum is σ = 128365498560. Its totient is φ = 58037256000.

The previous prime is 87961802003. The next prime is 87961802083. The reversal of 87961802031 is 13020816978.

87961802031 is a `hidden beast` number, since 8 + 7 + 9 + 618 + 0 + 20 + 3 + 1 = 666.

It is not a de Polignac number, because 87961802031 - 2¹⁹ = 87961277743 is a prime.

It is a super-2 number, since 2×87961802031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87961802231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2409825 + ... + 2446053.

It is an arithmetic number, because the mean of its divisors is an integer number (5348562440).

Almost surely, 2^87961802031 is an apocalyptic number.

87961802031 is a deficient number, since it is larger than the sum of its proper divisors (40403696529).

87961802031 is a wasteful number, since it uses less digits than its factorization.

87961802031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39007 (or 39004 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 87961802031 in words is "eighty-seven billion, nine hundred sixty-one million, eight hundred two thousand, thirty-one".