25901137650 has 48 divisors (see below), whose sum is σ = 64375549344. Its totient is φ = 6891838080.

The previous prime is 25901137621. The next prime is 25901137651. The reversal of 25901137650 is 5673110952.

It is a junction number, because it is equal to n+sod(n) for n = 25901137599 and 25901137608.

It is not an unprimeable number, because it can be changed into a prime (25901137651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120372 + ... + 257471.

It is an arithmetic number, because the mean of its divisors is an integer number (1341157278).

Almost surely, 2^25901137650 is an apocalyptic number.

25901137650 is an abundant number, since it is smaller than the sum of its proper divisors (38474411694).

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

25901137650 is a wasteful number, since it uses less digits than its factorization.

25901137650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378315 (or 378310 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 39.

The spelling of 25901137650 in words is "twenty-five billion, nine hundred one million, one hundred thirty-seven thousand, six hundred fifty".