2157432451188 has 48 divisors (see below), whose sum is σ = 5753392479744. Its totient is φ = 616383635040.

The previous prime is 2157432451001. The next prime is 2157432451243. The reversal of 2157432451188 is 8811542347512.

It is a super-2 number, since 2×2157432451188² (a number of 25 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 2157432451188.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1545531 + ... + 2589117.

It is an arithmetic number, because the mean of its divisors is an integer number (119862343328).

Almost surely, 2^{2157432451188} is an apocalyptic number.

2157432451188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2157432451188 is an abundant number, since it is smaller than the sum of its proper divisors (3595960028556).

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

2157432451188 is a wasteful number, since it uses less digits than its factorization.

2157432451188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068212 (or 1068210 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 51.

The spelling of 2157432451188 in words is "two trillion, one hundred fifty-seven billion, four hundred thirty-two million, four hundred fifty-one thousand, one hundred eighty-eight".