25550520424 has 32 divisors (see below), whose sum is σ = 56282617440. Its totient is φ = 10720497600.

The previous prime is 25550520421. The next prime is 25550520431. The reversal of 25550520424 is 42402505552.

It is a super-2 number, since 2×25550520424² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25550520424.

It is not an unprimeable number, because it can be changed into a prime (25550520421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11166042 + ... + 11168329.

It is an arithmetic number, because the mean of its divisors is an integer number (1758831795).

Almost surely, 2^25550520424 is an apocalyptic number.

It is an amenable number.

25550520424 is an abundant number, since it is smaller than the sum of its proper divisors (30732097016).

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

25550520424 is a wasteful number, since it uses less digits than its factorization.

25550520424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22334401 (or 22334397 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 34.

The spelling of 25550520424 in words is "twenty-five billion, five hundred fifty million, five hundred twenty thousand, four hundred twenty-four".