25245353555 has 16 divisors (see below), whose sum is σ = 30798278784. Its totient is φ = 19860535680.

The previous prime is 25245353543. The next prime is 25245353579. The reversal of 25245353555 is 55535354252.

It is a happy number.

It is not a de Polignac number, because 25245353555 - 2⁶ = 25245353491 is a prime.

It is a super-2 number, since 2×25245353555² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1920134 + ... + 1933236.

It is an arithmetic number, because the mean of its divisors is an integer number (1924892424).

Almost surely, 2^25245353555 is an apocalyptic number.

25245353555 is a deficient number, since it is larger than the sum of its proper divisors (5552925229).

25245353555 is a wasteful number, since it uses less digits than its factorization.

25245353555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19486.

The product of its digits is 2250000, while the sum is 44.

The spelling of 25245353555 in words is "twenty-five billion, two hundred forty-five million, three hundred fifty-three thousand, five hundred fifty-five".