25501523485 has 8 divisors (see below), whose sum is σ = 30612631896. Its totient is φ = 20394016320.

The previous prime is 25501523471. The next prime is 25501523501. The reversal of 25501523485 is 58432510552.

It can be written as a sum of positive squares in 4 ways, for example, as 2432166489 + 23069356996 = 49317^2 + 151886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25501523485 - 2⁹ = 25501522973 is a prime.

It is a Duffinian number.

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, 884706 + ... + 913075.

It is an arithmetic number, because the mean of its divisors is an integer number (3826578987).

Almost surely, 2^25501523485 is an apocalyptic number.

It is an amenable number.

25501523485 is a deficient number, since it is larger than the sum of its proper divisors (5111108411).

25501523485 is a wasteful number, since it uses less digits than its factorization.

25501523485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800623.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 25501523485 in words is "twenty-five billion, five hundred one million, five hundred twenty-three thousand, four hundred eighty-five".