2172151665500 has 48 divisors (see below), whose sum is σ = 4759233530688. Its totient is φ = 866066840000.

The previous prime is 2172151665499. The next prime is 2172151665547. The reversal of 2172151665500 is 55661512712.

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, 6828911 + ... + 7139910.

It is an arithmetic number, because the mean of its divisors is an integer number (99150698556).

Almost surely, 2^{2172151665500} is an apocalyptic number.

2172151665500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172151665500 is an abundant number, since it is smaller than the sum of its proper divisors (2587081865188).

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

2172151665500 is a wasteful number, since it uses less digits than its factorization.

2172151665500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13969151 (or 13969139 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 2172151665500 in words is "two trillion, one hundred seventy-two billion, one hundred fifty-one million, six hundred sixty-five thousand, five hundred".