25193145536 has 28 divisors (see below), whose sum is σ = 53838238272. Its totient is φ = 11627605248.

The previous prime is 25193145511. The next prime is 25193145577. The reversal of 25193145536 is 63554139152.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15139280 + ... + 15140943.

It is an arithmetic number, because the mean of its divisors is an integer number (1922794224).

Almost surely, 2^25193145536 is an apocalyptic number.

25193145536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25193145536 is an abundant number, since it is smaller than the sum of its proper divisors (28645092736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25193145536 is a wasteful number, since it uses less digits than its factorization.

25193145536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30280248 (or 30280238 counting only the distinct ones).

The product of its digits is 486000, while the sum is 44.

The spelling of 25193145536 in words is "twenty-five billion, one hundred ninety-three million, one hundred forty-five thousand, five hundred thirty-six".