2179169157897 has 40 divisors (see below), whose sum is σ = 3361111902720. Its totient is φ = 1405580843520.

The previous prime is 2179169157889. The next prime is 2179169157941. The reversal of 2179169157897 is 7987519619712.

It is not a de Polignac number, because 2179169157897 - 2³ = 2179169157889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2179169156897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10668508 + ... + 10870850.

It is an arithmetic number, because the mean of its divisors is an integer number (84027797568).

Almost surely, 2^{2179169157897} is an apocalyptic number.

2179169157897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2179169157897 is a deficient number, since it is larger than the sum of its proper divisors (1181942744823).

2179169157897 is a wasteful number, since it uses less digits than its factorization.

2179169157897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206675 (or 206666 counting only the distinct ones).

The product of its digits is 120022560, while the sum is 72.

The spelling of 2179169157897 in words is "two trillion, one hundred seventy-nine billion, one hundred sixty-nine million, one hundred fifty-seven thousand, eight hundred ninety-seven".