25140055642 has 32 divisors (see below), whose sum is σ = 41708338560. Its totient is φ = 11293435200.

The previous prime is 25140055639. The next prime is 25140055663. The reversal of 25140055642 is 24655004152.

It is a junction number, because it is equal to n+sod(n) for n = 25140055598 and 25140055607.

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, 73803 + ... + 236065.

It is an arithmetic number, because the mean of its divisors is an integer number (1303385580).

Almost surely, 2^25140055642 is an apocalyptic number.

25140055642 is a deficient number, since it is larger than the sum of its proper divisors (16568282918).

25140055642 is a wasteful number, since it uses less digits than its factorization.

25140055642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162438.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 25140055642 its reverse (24655004152), we get a palindrome (49795059794).

The spelling of 25140055642 in words is "twenty-five billion, one hundred forty million, fifty-five thousand, six hundred forty-two".