25423705632 has 144 divisors (see below), whose sum is σ = 76517511840. Its totient is φ = 7362441216.

The previous prime is 25423705613. The next prime is 25423705639. The reversal of 25423705632 is 23650732452.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (25423705639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229719 + ... + 321897.

It is an arithmetic number, because the mean of its divisors is an integer number (531371610).

Almost surely, 2^25423705632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25423705632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38258755920).

25423705632 is an abundant number, since it is smaller than the sum of its proper divisors (51093806208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25423705632 is a wasteful number, since it uses less digits than its factorization.

25423705632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92235 (or 92214 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 39.

The spelling of 25423705632 in words is "twenty-five billion, four hundred twenty-three million, seven hundred five thousand, six hundred thirty-two".