25642436601 has 8 divisors (see below), whose sum is σ = 34191869920. Its totient is φ = 17093980512.

The previous prime is 25642436569. The next prime is 25642436629. The reversal of 25642436601 is 10663424652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25642436601 - 2⁵ = 25642436569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25642436601.

It is not an unprimeable number, because it can be changed into a prime (25642416601) 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, 180715 + ... + 289728.

It is an arithmetic number, because the mean of its divisors is an integer number (4273983740).

Almost surely, 2^25642436601 is an apocalyptic number.

It is an amenable number.

25642436601 is a deficient number, since it is larger than the sum of its proper divisors (8549433319).

25642436601 is a wasteful number, since it uses less digits than its factorization.

25642436601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488615.

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 25642436601 in words is "twenty-five billion, six hundred forty-two million, four hundred thirty-six thousand, six hundred one".