25187693542 has 16 divisors (see below), whose sum is σ = 41616387072. Its totient is φ = 11337795720.

The previous prime is 25187693497. The next prime is 25187693543. The reversal of 25187693542 is 24539678152.

25187693542 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 25187693542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25187693543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5555478 + ... + 5560009.

It is an arithmetic number, because the mean of its divisors is an integer number (2601024192).

Almost surely, 2^25187693542 is an apocalyptic number.

25187693542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25187693542 is a deficient number, since it is larger than the sum of its proper divisors (16428693530).

25187693542 is a wasteful number, since it uses less digits than its factorization.

25187693542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11115603.

The product of its digits is 3628800, while the sum is 52.

The spelling of 25187693542 in words is "twenty-five billion, one hundred eighty-seven million, six hundred ninety-three thousand, five hundred forty-two".