2151131662456 has 16 divisors (see below), whose sum is σ = 4609567848240. Its totient is φ = 921913569600.

The previous prime is 2151131662453. The next prime is 2151131662513. The reversal of 2151131662456 is 6542661311512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151131662451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19206532645 + ... + 19206532756.

It is an arithmetic number, because the mean of its divisors is an integer number (288097990515).

Almost surely, 2^{2151131662456} is an apocalyptic number.

It is an amenable number.

2151131662456 is an abundant number, since it is smaller than the sum of its proper divisors (2458436185784).

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

2151131662456 is a wasteful number, since it uses less digits than its factorization.

2151131662456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38413065414 (or 38413065410 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

Adding to 2151131662456 its reverse (6542661311512), we get a palindrome (8693792973968).

The spelling of 2151131662456 in words is "two trillion, one hundred fifty-one billion, one hundred thirty-one million, six hundred sixty-two thousand, four hundred fifty-six".