25615989134 has 16 divisors (see below), whose sum is σ = 40121771040. Its totient is φ = 12242820480.

The previous prime is 25615989131. The next prime is 25615989137. The reversal of 25615989134 is 43198951652.

It is an interprime number because it is at equal distance from previous prime (25615989131) and next prime (25615989137).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25615989131) 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, 119879 + ... + 256130.

It is an arithmetic number, because the mean of its divisors is an integer number (2507610690).

Almost surely, 2^25615989134 is an apocalyptic number.

25615989134 is a deficient number, since it is larger than the sum of its proper divisors (14505781906).

25615989134 is a wasteful number, since it uses less digits than its factorization.

25615989134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377515.

The product of its digits is 2332800, while the sum is 53.

The spelling of 25615989134 in words is "twenty-five billion, six hundred fifteen million, nine hundred eighty-nine thousand, one hundred thirty-four".