2161023176508 has 48 divisors (see below), whose sum is σ = 5843893676544. Its totient is φ = 608738921280.

The previous prime is 2161023176449. The next prime is 2161023176551. The reversal of 2161023176508 is 8056713201612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 2161023176508.

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, 181166335 + ... + 181178262.

It is an arithmetic number, because the mean of its divisors is an integer number (121747784928).

Almost surely, 2^{2161023176508} is an apocalyptic number.

2161023176508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2161023176508 is an abundant number, since it is smaller than the sum of its proper divisors (3682870500036).

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

2161023176508 is a wasteful number, since it uses less digits than its factorization.

2161023176508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362344682 (or 362344680 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 2161023176508 in words is "two trillion, one hundred sixty-one billion, twenty-three million, one hundred seventy-six thousand, five hundred eight".