11970990681 has 16 divisors (see below), whose sum is σ = 17192849856. Its totient is φ = 7365162816.

The previous prime is 11970990677. The next prime is 11970990739. The reversal of 11970990681 is 18609907911.

It is not a de Polignac number, because 11970990681 - 2² = 11970990677 is a prime.

It is a super-2 number, since 2×11970990681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11970990611) 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, 163086 + ... + 224808.

It is an arithmetic number, because the mean of its divisors is an integer number (1074553116).

Almost surely, 2^11970990681 is an apocalyptic number.

It is an amenable number.

11970990681 is a deficient number, since it is larger than the sum of its proper divisors (5221859175).

11970990681 is a wasteful number, since it uses less digits than its factorization.

11970990681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66712.

The product of its (nonzero) digits is 244944, while the sum is 51.

The spelling of 11970990681 in words is "eleven billion, nine hundred seventy million, nine hundred ninety thousand, six hundred eighty-one".