25161585380 has 12 divisors (see below), whose sum is σ = 52839329340. Its totient is φ = 10064634144.

The previous prime is 25161585353. The next prime is 25161585419. The reversal of 25161585380 is 8358516152.

It can be written as a sum of positive squares in 2 ways, for example, as 9269453284 + 15892132096 = 96278^2 + 126064^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629039615 + ... + 629039654.

It is an arithmetic number, because the mean of its divisors is an integer number (4403277445).

Almost surely, 2^25161585380 is an apocalyptic number.

25161585380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25161585380 is an abundant number, since it is smaller than the sum of its proper divisors (27677743960).

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

25161585380 is a wasteful number, since it uses less digits than its factorization.

25161585380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258079278 (or 1258079276 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 25161585380 in words is "twenty-five billion, one hundred sixty-one million, five hundred eighty-five thousand, three hundred eighty".