25515132042 has 8 divisors (see below), whose sum is σ = 51030264096. Its totient is φ = 8505044012.

The previous prime is 25515132037. The next prime is 25515132043. The reversal of 25515132042 is 24023151552.

It is a sphenic number, since it is the product of 3 distinct primes.

25515132042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (25515132043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2126260998 + ... + 2126261009.

It is an arithmetic number, because the mean of its divisors is an integer number (6378783012).

Almost surely, 2^25515132042 is an apocalyptic number.

25515132042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25515132042 is a wasteful number, since it uses less digits than its factorization.

25515132042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252522012.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 25515132042 its reverse (24023151552), we get a palindrome (49538283594).

The spelling of 25515132042 in words is "twenty-five billion, five hundred fifteen million, one hundred thirty-two thousand, forty-two".