25127062640 has 20 divisors (see below), whose sum is σ = 58420420824. Its totient is φ = 10050825024.

The previous prime is 25127062607. The next prime is 25127062643. The reversal of 25127062640 is 4626072152.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 25127062640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25127062643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157044062 + ... + 157044221.

Almost surely, 2^25127062640 is an apocalyptic number.

25127062640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25127062640 is an abundant number, since it is smaller than the sum of its proper divisors (33293358184).

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

25127062640 is a wasteful number, since it uses less digits than its factorization.

25127062640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314088296 (or 314088290 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 25127062640 in words is "twenty-five billion, one hundred twenty-seven million, sixty-two thousand, six hundred forty".