25487764455 has 16 divisors (see below), whose sum is σ = 40987435104. Its totient is φ = 13524470400.

The previous prime is 25487764447. The next prime is 25487764457. The reversal of 25487764455 is 55446778452.

It is not a de Polignac number, because 25487764455 - 2³ = 25487764447 is a prime.

It is a super-2 number, since 2×25487764455² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25487764395 and 25487764404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25487764457) 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, 4309696 + ... + 4315605.

It is an arithmetic number, because the mean of its divisors is an integer number (2561714694).

Almost surely, 2^25487764455 is an apocalyptic number.

25487764455 is a deficient number, since it is larger than the sum of its proper divisors (15499670649).

25487764455 is a wasteful number, since it uses less digits than its factorization.

25487764455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8625506.

The product of its digits is 37632000, while the sum is 57.

The spelling of 25487764455 in words is "twenty-five billion, four hundred eighty-seven million, seven hundred sixty-four thousand, four hundred fifty-five".