25523530320 has 40 divisors (see below), whose sum is σ = 79122944736. Its totient is φ = 6806274688.

The previous prime is 25523530301. The next prime is 25523530343. The reversal of 25523530320 is 2303532552.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53173782 + ... + 53174261.

Almost surely, 2^25523530320 is an apocalyptic number.

25523530320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25523530320 is an abundant number, since it is smaller than the sum of its proper divisors (53599414416).

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

25523530320 is a wasteful number, since it uses less digits than its factorization.

25523530320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106348059 (or 106348053 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 30.

The spelling of 25523530320 in words is "twenty-five billion, five hundred twenty-three million, five hundred thirty thousand, three hundred twenty".