11156990465 has 16 divisors (see below), whose sum is σ = 13441729680. Its totient is φ = 8890103040.

The previous prime is 11156990459. The next prime is 11156990497. The reversal of 11156990465 is 56409965111.

It can be written as a sum of positive squares in 8 ways, for example, as 868539841 + 10288450624 = 29471^2 + 101432^2 .

It is not a de Polignac number, because 11156990465 - 2¹⁸ = 11156728321 is a prime.

It is a super-3 number, since 3×11156990465³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421171 + ... + 1428999.

It is an arithmetic number, because the mean of its divisors is an integer number (840108105).

Almost surely, 2^11156990465 is an apocalyptic number.

It is an amenable number.

11156990465 is a deficient number, since it is larger than the sum of its proper divisors (2284739215).

11156990465 is an equidigital number, since it uses as much as digits as its factorization.

11156990465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8932.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 11156990465 in words is "eleven billion, one hundred fifty-six million, nine hundred ninety thousand, four hundred sixty-five".