25520330564 has 6 divisors (see below), whose sum is σ = 44660578494. Its totient is φ = 12760165280.

The previous prime is 25520330503. The next prime is 25520330569. The reversal of 25520330564 is 46503302552.

It can be written as a sum of positive squares in only one way, i.e., 25456202500 + 64128064 = 159550^2 + 8008^2 .

It is a super-3 number, since 3×25520330564³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25520330569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3190041317 + ... + 3190041324.

It is an arithmetic number, because the mean of its divisors is an integer number (7443429749).

Almost surely, 2^25520330564 is an apocalyptic number.

It is an amenable number.

25520330564 is a deficient number, since it is larger than the sum of its proper divisors (19140247930).

25520330564 is a wasteful number, since it uses less digits than its factorization.

25520330564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6380082645 (or 6380082643 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

The spelling of 25520330564 in words is "twenty-five billion, five hundred twenty million, three hundred thirty thousand, five hundred sixty-four".