2157099636 has 12 divisors (see below), whose sum is σ = 5033232512. Its totient is φ = 719033208.

The previous prime is 2157099613. The next prime is 2157099653. The reversal of 2157099636 is 6369907512.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89879140 + ... + 89879163.

Almost surely, 2^2157099636 is an apocalyptic number.

It is an amenable number.

2157099636 is an abundant number, since it is smaller than the sum of its proper divisors (2876132876).

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

2157099636 is a wasteful number, since it uses less digits than its factorization.

2157099636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179758310 (or 179758308 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 2157099636 is about 46444.5867243966. The cubic root of 2157099636 is about 1292.0819766380.

The spelling of 2157099636 in words is "two billion, one hundred fifty-seven million, ninety-nine thousand, six hundred thirty-six".