2157990824914 has 4 divisors (see below), whose sum is σ = 3236986237374. Its totient is φ = 1078995412456.

The previous prime is 2157990824887. The next prime is 2157990824921. The reversal of 2157990824914 is 4194280997512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1113267663225 + 1044723161689 = 1055115^2 + 1022117^2 .

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 as a sum of consecutive naturals, namely, 539497706227 + ... + 539497706230.

Almost surely, 2^{2157990824914} is an apocalyptic number.

2157990824914 is a deficient number, since it is larger than the sum of its proper divisors (1078995412460).

2157990824914 is a wasteful number, since it uses less digits than its factorization.

2157990824914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078995412459.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 2157990824914 in words is "two trillion, one hundred fifty-seven billion, nine hundred ninety million, eight hundred twenty-four thousand, nine hundred fourteen".