25220553253530 has 64 divisors (see below), whose sum is σ = 64126564444800. Its totient is φ = 6326240845824.

The previous prime is 25220553253507. The next prime is 25220553253543. The reversal of 25220553253530 is 3535235502252.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13262455 + ... + 15044394.

It is an arithmetic number, because the mean of its divisors is an integer number (1001977569450).

Almost surely, 2^{25220553253530} is an apocalyptic number.

25220553253530 is an abundant number, since it is smaller than the sum of its proper divisors (38906011191270).

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

25220553253530 is a wasteful number, since it uses less digits than its factorization.

25220553253530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28308623.

The product of its (nonzero) digits is 1350000, while the sum is 42.

Adding to 25220553253530 its reverse (3535235502252), we get a palindrome (28755788755782).

The spelling of 25220553253530 in words is "twenty-five trillion, two hundred twenty billion, five hundred fifty-three million, two hundred fifty-three thousand, five hundred thirty".