25496811801 has 8 divisors (see below), whose sum is σ = 37773054560. Its totient is φ = 16997874516.

The previous prime is 25496811799. The next prime is 25496811853. The reversal of 25496811801 is 10811869452.

It is a happy number.

25496811801 is a `hidden beast` number, since 2 + 5 + 496 + 81 + 1 + 80 + 1 = 666.

It is not a de Polignac number, because 25496811801 - 2¹ = 25496811799 is a prime.

It is a super-2 number, since 2×25496811801² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25496811101) 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, 472163155 + ... + 472163208.

It is an arithmetic number, because the mean of its divisors is an integer number (4721631820).

Almost surely, 2^25496811801 is an apocalyptic number.

It is an amenable number.

25496811801 is a deficient number, since it is larger than the sum of its proper divisors (12276242759).

25496811801 is an equidigital number, since it uses as much as digits as its factorization.

25496811801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944326372 (or 944326366 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 25496811801 in words is "twenty-five billion, four hundred ninety-six million, eight hundred eleven thousand, eight hundred one".