2155574755512 has 256 divisors, whose sum is σ = 6480498355200. Its totient is φ = 662082854400.

The previous prime is 2155574755469. The next prime is 2155574755547.

2155574755512 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 5 + 74 + 7 + 55 + 512 = 666.

2155574755512 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18507363 + ... + 18623469.

It is an arithmetic number, because the mean of its divisors is an integer number (25314446700).

Almost surely, 2^{2155574755512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155574755512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3240249177600).

2155574755512 is an abundant number, since it is smaller than the sum of its proper divisors (4324923599688).

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

2155574755512 is a wasteful number, since it uses less digits than its factorization.

2155574755512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116283 (or 116273 counting only the distinct ones).

The product of its digits is 12250000, while the sum is 54.

The spelling of 2155574755512 in words is "two trillion, one hundred fifty-five billion, five hundred seventy-four million, seven hundred fifty-five thousand, five hundred twelve".