25454270644 has 24 divisors (see below), whose sum is σ = 49418157600. Its totient is φ = 11374018080.

The previous prime is 25454270641. The next prime is 25454270693. The reversal of 25454270644 is 44607245452.

It is a self number, because there is not a number n which added to its sum of digits gives 25454270644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25454270641) 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, 4899999 + ... + 4905190.

It is an arithmetic number, because the mean of its divisors is an integer number (2059089900).

Almost surely, 2^25454270644 is an apocalyptic number.

It is an amenable number.

25454270644 is a deficient number, since it is larger than the sum of its proper divisors (23963886956).

25454270644 is a wasteful number, since it uses less digits than its factorization.

25454270644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9805263 (or 9805261 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 43.

The spelling of 25454270644 in words is "twenty-five billion, four hundred fifty-four million, two hundred seventy thousand, six hundred forty-four".