25355653456651 has 16 divisors (see below), whose sum is σ = 29984960332800. Its totient is φ = 20989472188608.

The previous prime is 25355653456631. The next prime is 25355653456669. The reversal of 25355653456651 is 15665435655352.

It is not a de Polignac number, because 25355653456651 - 2¹¹ = 25355653454603 is a prime.

It is a super-2 number, since 2×25355653456651² (a number of 28 digits) contains 22 as substring.

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 25355653456651.

It is not an unprimeable number, because it can be changed into a prime (25355653456631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473220691 + ... + 473274268.

It is an arithmetic number, because the mean of its divisors is an integer number (1874060020800).

Almost surely, 2^{25355653456651} is an apocalyptic number.

25355653456651 is a deficient number, since it is larger than the sum of its proper divisors (4629306876149).

25355653456651 is an equidigital number, since it uses as much as digits as its factorization.

25355653456651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946495098.

The product of its digits is 243000000, while the sum is 61.

The spelling of 25355653456651 in words is "twenty-five trillion, three hundred fifty-five billion, six hundred fifty-three million, four hundred fifty-six thousand, six hundred fifty-one".