25555536212 has 48 divisors (see below), whose sum is σ = 47867193360. Its totient is φ = 11896215552.

The previous prime is 25555536203. The next prime is 25555536217. The reversal of 25555536212 is 21263555552.

It can be written as a sum of positive squares in 8 ways, for example, as 8758339396 + 16797196816 = 93586^2 + 129604^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25555536212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555536217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2439578 + ... + 2450030.

It is an arithmetic number, because the mean of its divisors is an integer number (997233195).

Almost surely, 2^25555536212 is an apocalyptic number.

It is an amenable number.

25555536212 is a deficient number, since it is larger than the sum of its proper divisors (22311657148).

25555536212 is a wasteful number, since it uses less digits than its factorization.

25555536212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10860 (or 10858 counting only the distinct ones).

The product of its digits is 450000, while the sum is 41.

The spelling of 25555536212 in words is "twenty-five billion, five hundred fifty-five million, five hundred thirty-six thousand, two hundred twelve".