11625271281 has 64 divisors (see below), whose sum is σ = 19203072000. Its totient is φ = 6902521920.

The previous prime is 11625271249. The next prime is 11625271289. The reversal of 11625271281 is 18217252611.

It is a happy number.

11625271281 is a `hidden beast` number, since 1 + 1 + 6 + 2 + 527 + 128 + 1 = 666.

It is not a de Polignac number, because 11625271281 - 2⁵ = 11625271249 is a prime.

It is a super-2 number, since 2×11625271281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11625271289) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4122490 + ... + 4125308.

It is an arithmetic number, because the mean of its divisors is an integer number (300048000).

Almost surely, 2^11625271281 is an apocalyptic number.

It is an amenable number.

11625271281 is a deficient number, since it is larger than the sum of its proper divisors (7577800719).

11625271281 is a wasteful number, since it uses less digits than its factorization.

11625271281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251 (or 3245 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The spelling of 11625271281 in words is "eleven billion, six hundred twenty-five million, two hundred seventy-one thousand, two hundred eighty-one".