2155266625512 has 384 divisors, whose sum is σ = 7718064480000. Its totient is φ = 486349332480.

The previous prime is 2155266625487. The next prime is 2155266625531.

It is a happy number.

2155266625512 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4252614 + ... + 4732362.

It is an arithmetic number, because the mean of its divisors is an integer number (20099126250).

Almost surely, 2^{2155266625512} is an apocalyptic number.

2155266625512 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 2155266625512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3859032240000).

2155266625512 is an abundant number, since it is smaller than the sum of its proper divisors (5562797854488).

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

2155266625512 is a wasteful number, since it uses less digits than its factorization.

2155266625512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479817 (or 479802 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 48.

The spelling of 2155266625512 in words is "two trillion, one hundred fifty-five billion, two hundred sixty-six million, six hundred twenty-five thousand, five hundred twelve".