25621100401 has 64 divisors (see below), whose sum is σ = 31853606400. Its totient is φ = 20355895296.

The previous prime is 25621100387. The next prime is 25621100429. The reversal of 25621100401 is 10400112652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25621100401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25621100471) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11095035 + ... + 11097343.

It is an arithmetic number, because the mean of its divisors is an integer number (497712600).

Almost surely, 2^25621100401 is an apocalyptic number.

It is an amenable number.

25621100401 is a deficient number, since it is larger than the sum of its proper divisors (6232505999).

25621100401 is a wasteful number, since it uses less digits than its factorization.

25621100401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458.

The product of its (nonzero) digits is 480, while the sum is 22.

The spelling of 25621100401 in words is "twenty-five billion, six hundred twenty-one million, one hundred thousand, four hundred one".