25515532042 has 32 divisors (see below), whose sum is σ = 51387928704. Its totient is φ = 9176414400.

The previous prime is 25515532037. The next prime is 25515532129. The reversal of 25515532042 is 24023551552.

It is a junction number, because it is equal to n+sod(n) for n = 25515531989 and 25515532007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6370509 + ... + 6374512.

It is an arithmetic number, because the mean of its divisors is an integer number (1605872772).

Almost surely, 2^25515532042 is an apocalyptic number.

25515532042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25515532042 is an abundant number, since it is smaller than the sum of its proper divisors (25872396662).

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

25515532042 is a wasteful number, since it uses less digits than its factorization.

25515532042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12745054.

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 25515532042 in words is "twenty-five billion, five hundred fifteen million, five hundred thirty-two thousand, forty-two".