11880390261 has 32 divisors (see below), whose sum is σ = 16722650880. Its totient is φ = 7487642624.

The previous prime is 11880390257. The next prime is 11880390293. The reversal of 11880390261 is 16209308811.

It is a cyclic number.

It is not a de Polignac number, because 11880390261 - 2² = 11880390257 is a prime.

It is a super-2 number, since 2×11880390261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11880390761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3031075 + ... + 3034991.

It is an arithmetic number, because the mean of its divisors is an integer number (522582840).

Almost surely, 2^11880390261 is an apocalyptic number.

It is an amenable number.

11880390261 is a deficient number, since it is larger than the sum of its proper divisors (4842260619).

11880390261 is a wasteful number, since it uses less digits than its factorization.

11880390261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445.

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 11880390261 in words is "eleven billion, eight hundred eighty million, three hundred ninety thousand, two hundred sixty-one".