25024485621 has 4 divisors (see below), whose sum is σ = 33365980832. Its totient is φ = 16682990412.

The previous prime is 25024485617. The next prime is 25024485631. The reversal of 25024485621 is 12658442052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25024485621 - 2² = 25024485617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25024485621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25024485631) 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, 4170747601 + ... + 4170747606.

It is an arithmetic number, because the mean of its divisors is an integer number (8341495208).

Almost surely, 2^25024485621 is an apocalyptic number.

It is an amenable number.

25024485621 is a deficient number, since it is larger than the sum of its proper divisors (8341495211).

25024485621 is an equidigital number, since it uses as much as digits as its factorization.

25024485621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8341495210.

The product of its (nonzero) digits is 153600, while the sum is 39.

The spelling of 25024485621 in words is "twenty-five billion, twenty-four million, four hundred eighty-five thousand, six hundred twenty-one".