2151326242065 has 96 divisors (see below), whose sum is σ = 4704118989696. Its totient is φ = 825283952640.

The previous prime is 2151326242057. The next prime is 2151326242067. The reversal of 2151326242065 is 5602426231512.

It is not a de Polignac number, because 2151326242065 - 2³ = 2151326242057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2151326242067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10129072 + ... + 10339281.

It is an arithmetic number, because the mean of its divisors is an integer number (49001239476).

Almost surely, 2^{2151326242065} is an apocalyptic number.

It is an amenable number.

2151326242065 is an abundant number, since it is smaller than the sum of its proper divisors (2552792747631).

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

2151326242065 is a wasteful number, since it uses less digits than its factorization.

2151326242065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20468399 (or 20468392 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 2151326242065 in words is "two trillion, one hundred fifty-one billion, three hundred twenty-six million, two hundred forty-two thousand, sixty-five".