25556500516051 has 4 divisors (see below), whose sum is σ = 26901579490600. Its totient is φ = 24211421541504.

The previous prime is 25556500516037. The next prime is 25556500516081. The reversal of 25556500516051 is 15061500565552.

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 25556500516051 - 2²⁹ = 25555963645139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25556500515992 and 25556500516010.

It is not an unprimeable number, because it can be changed into a prime (25556500516021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672539487246 + ... + 672539487283.

It is an arithmetic number, because the mean of its divisors is an integer number (6725394872650).

Almost surely, 2^{25556500516051} is an apocalyptic number.

25556500516051 is a deficient number, since it is larger than the sum of its proper divisors (1345078974549).

25556500516051 is a wasteful number, since it uses less digits than its factorization.

25556500516051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345078974548.

The product of its (nonzero) digits is 1125000, while the sum is 46.

The spelling of 25556500516051 in words is "twenty-five trillion, five hundred fifty-six billion, five hundred million, five hundred sixteen thousand, fifty-one".