2157812001876 has 48 divisors (see below), whose sum is σ = 5061754736640. Its totient is φ = 715434259680.

The previous prime is 2157812001871. The next prime is 2157812001893. The reversal of 2157812001876 is 6781002187512.

It is a super-2 number, since 2×2157812001876² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157812001871) by changing a digit.

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, 26498415 + ... + 26579721.

It is an arithmetic number, because the mean of its divisors is an integer number (105453223680).

Almost surely, 2^{2157812001876} is an apocalyptic number.

It is an amenable number.

2157812001876 is an abundant number, since it is smaller than the sum of its proper divisors (2903942734764).

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

2157812001876 is a wasteful number, since it uses less digits than its factorization.

2157812001876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93084 (or 93082 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 2157812001876 in words is "two trillion, one hundred fifty-seven billion, eight hundred twelve million, one thousand, eight hundred seventy-six".