25000694138 has 16 divisors (see below), whose sum is σ = 42987822144. Its totient is φ = 10682210880.

The previous prime is 25000694137. The next prime is 25000694143. The reversal of 25000694138 is 83149600052.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25000694137) 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, 2692895 + ... + 2702162.

It is an arithmetic number, because the mean of its divisors is an integer number (2686738884).

Almost surely, 2^25000694138 is an apocalyptic number.

25000694138 is a deficient number, since it is larger than the sum of its proper divisors (17987128006).

25000694138 is a wasteful number, since it uses less digits than its factorization.

25000694138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395397.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 25000694138 in words is "twenty-five billion, six hundred ninety-four thousand, one hundred thirty-eight".