25564550601 has 8 divisors (see below), whose sum is σ = 34090767904. Its totient is φ = 17040683520.

The previous prime is 25564550567. The next prime is 25564550617. The reversal of 25564550601 is 10605546552.

It is a happy number.

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

It is not a de Polignac number, because 25564550601 - 2¹⁴ = 25564534217 is a prime.

It is a super-2 number, since 2×25564550601² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25564550601.

It is not an unprimeable number, because it can be changed into a prime (25564570601) 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, 562015 + ... + 605796.

It is an arithmetic number, because the mean of its divisors is an integer number (4261345988).

Almost surely, 2^25564550601 is an apocalyptic number.

It is an amenable number.

25564550601 is a deficient number, since it is larger than the sum of its proper divisors (8526217303).

25564550601 is a wasteful number, since it uses less digits than its factorization.

25564550601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175111.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 25564550601 in words is "twenty-five billion, five hundred sixty-four million, five hundred fifty thousand, six hundred one".