25401600001 has 4 divisors (see below), whose sum is σ = 25404157012. Its totient is φ = 25399042992.

The previous prime is 25401599999. The next prime is 25401600011. The reversal of 25401600001 is 10000610452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 815673600 + 24585926401 = 28560^2 + 156799^2 .

It is a cyclic number.

It is not a de Polignac number, because 25401600001 - 2¹ = 25401599999 is a prime.

It is a super-2 number, since 2×25401600001² (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 (25401600011) 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, 1263546 + ... + 1283491.

It is an arithmetic number, because the mean of its divisors is an integer number (6351039253).

Almost surely, 2^25401600001 is an apocalyptic number.

It is an amenable number.

25401600001 is a deficient number, since it is larger than the sum of its proper divisors (2557011).

25401600001 is an equidigital number, since it uses as much as digits as its factorization.

25401600001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557010.

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 25401600001 in words is "twenty-five billion, four hundred one million, six hundred thousand, one".