24872572561 has 4 divisors (see below), whose sum is σ = 25114053952. Its totient is φ = 24631091172.

The previous prime is 24872572541. The next prime is 24872572583. The reversal of 24872572561 is 16527527842.

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 a cyclic number.

It is not a de Polignac number, because 24872572561 - 2⁷ = 24872572433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24872572541) 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, 120740541 + ... + 120740746.

It is an arithmetic number, because the mean of its divisors is an integer number (6278513488).

Almost surely, 2^24872572561 is an apocalyptic number.

It is an amenable number.

24872572561 is a deficient number, since it is larger than the sum of its proper divisors (241481391).

24872572561 is a wasteful number, since it uses less digits than its factorization.

24872572561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241481390.

The product of its digits is 1881600, while the sum is 49.

The spelling of 24872572561 in words is "twenty-four billion, eight hundred seventy-two million, five hundred seventy-two thousand, five hundred sixty-one".