25495005555 has 40 divisors (see below), whose sum is σ = 45759100464. Its totient is φ = 13580395200.

The previous prime is 25495005533. The next prime is 25495005583. The reversal of 25495005555 is 55550059452.

25495005555 is a `hidden beast` number, since 2 + 5 + 4 + 95 + 0 + 0 + 5 + 555 = 666.

It is not a de Polignac number, because 25495005555 - 2⁷ = 25495005427 is a prime.

It is a super-3 number, since 3×25495005555³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25495005555.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 289645 + ... + 367265.

Almost surely, 2^25495005555 is an apocalyptic number.

25495005555 is a deficient number, since it is larger than the sum of its proper divisors (20264094909).

25495005555 is an equidigital number, since it uses as much as digits as its factorization.

25495005555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78449 (or 78440 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 45.

The spelling of 25495005555 in words is "twenty-five billion, four hundred ninety-five million, five thousand, five hundred fifty-five".