2251351065599 has 4 divisors (see below), whose sum is σ = 2251458811800. Its totient is φ = 2251243319400.

The previous prime is 2251351065581. The next prime is 2251351065619. The reversal of 2251351065599 is 9955601531522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2251351065599 - 2⁸ = 2251351065343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2251351065599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251351067599) 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, 53841752 + ... + 53883549.

It is an arithmetic number, because the mean of its divisors is an integer number (562864702950).

Almost surely, 2^{2251351065599} is an apocalyptic number.

2251351065599 is a deficient number, since it is larger than the sum of its proper divisors (107746201).

2251351065599 is a wasteful number, since it uses less digits than its factorization.

2251351065599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107746200.

The product of its (nonzero) digits is 3645000, while the sum is 53.

The spelling of 2251351065599 in words is "two trillion, two hundred fifty-one billion, three hundred fifty-one million, sixty-five thousand, five hundred ninety-nine".