11725770681 has 20 divisors (see below), whose sum is σ = 17654213632. Its totient is φ = 7755621048.

The previous prime is 11725770647. The next prime is 11725770697. The reversal of 11725770681 is 18607752711.

11725770681 is a `hidden beast` number, since 1 + 1 + 72 + 577 + 0 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 11725770681 - 2⁹ = 11725770169 is a prime.

It is a super-2 number, since 2×11725770681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11725775681) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 559645 + ... + 580218.

Almost surely, 2^11725770681 is an apocalyptic number.

It is an amenable number.

11725770681 is a deficient number, since it is larger than the sum of its proper divisors (5928442951).

11725770681 is a wasteful number, since it uses less digits than its factorization.

11725770681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140002 (or 1139993 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 45.

The spelling of 11725770681 in words is "eleven billion, seven hundred twenty-five million, seven hundred seventy thousand, six hundred eighty-one".