87991002020202 has 96 divisors (see below), whose sum is σ = 187608153927744. Its totient is φ = 27506944819200.

The previous prime is 87991002020189. The next prime is 87991002020221. The reversal of 87991002020202 is 20202020019978.

It is a super-2 number, since 2×87991002020202² (a number of 29 digits) contains 22 as substring.

87991002020202 is a modest number, since divided by 2020202 gives 879910 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 562693258 + ... + 562849610.

It is an arithmetic number, because the mean of its divisors is an integer number (1954251603414).

Almost surely, 2^{87991002020202} is an apocalyptic number.

87991002020202 is an abundant number, since it is smaller than the sum of its proper divisors (99617151907542).

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

87991002020202 is a wasteful number, since it uses less digits than its factorization.

87991002020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157544 (or 157527 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 87991002020202 in words is "eighty-seven trillion, nine hundred ninety-one billion, two million, twenty thousand, two hundred two".