25505255005530 has 64 divisors (see below), whose sum is σ = 61535142408960. Its totient is φ = 6765642796544.

The previous prime is 25505255005501. The next prime is 25505255005547. The reversal of 25505255005530 is 3550055250552.

It is a happy number.

It is a super-2 number, since 2×25505255005530² (a number of 28 digits) contains 22 as substring.

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, 2778862 + ... + 7663718.

It is an arithmetic number, because the mean of its divisors is an integer number (961486600140).

Almost surely, 2^{25505255005530} is an apocalyptic number.

25505255005530 is an abundant number, since it is smaller than the sum of its proper divisors (36029887403430).

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

25505255005530 is a wasteful number, since it uses less digits than its factorization.

25505255005530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885783.

The product of its (nonzero) digits is 937500, while the sum is 42.

The spelling of 25505255005530 in words is "twenty-five trillion, five hundred five billion, two hundred fifty-five million, five thousand, five hundred thirty".