2151532225665 has 48 divisors (see below), whose sum is σ = 3864355672320. Its totient is φ = 1106610785280.

The previous prime is 2151532225649. The next prime is 2151532225697. The reversal of 2151532225665 is 5665222351512.

2151532225665 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 532 + 2 + 2 + 56 + 65 = 666.

It is not a de Polignac number, because 2151532225665 - 2⁴ = 2151532225649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2151532225665.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6884496 + ... + 7190225.

It is an arithmetic number, because the mean of its divisors is an integer number (80507409840).

Almost surely, 2^{2151532225665} is an apocalyptic number.

It is an amenable number.

2151532225665 is a deficient number, since it is larger than the sum of its proper divisors (1712823446655).

2151532225665 is a wasteful number, since it uses less digits than its factorization.

2151532225665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14074854 (or 14074851 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The spelling of 2151532225665 in words is "two trillion, one hundred fifty-one billion, five hundred thirty-two million, two hundred twenty-five thousand, six hundred sixty-five".