2156550556512 has 192 divisors, whose sum is σ = 6394915312128. Its totient is φ = 635836608000.

The previous prime is 2156550556493. The next prime is 2156550556553.

2156550556512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×2156550556512² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4499637 + ... + 4955787.

It is an arithmetic number, because the mean of its divisors is an integer number (33306850584).

Almost surely, 2^{2156550556512} is an apocalyptic number.

2156550556512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156550556512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3197457656064).

2156550556512 is an abundant number, since it is smaller than the sum of its proper divisors (4238364755616).

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

2156550556512 is a wasteful number, since it uses less digits than its factorization.

2156550556512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456234 (or 456204 counting only the distinct ones).

The product of its (nonzero) digits is 2250000, while the sum is 48.

The spelling of 2156550556512 in words is "two trillion, one hundred fifty-six billion, five hundred fifty million, five hundred fifty-six thousand, five hundred twelve".