11916972690 has 64 divisors (see below), whose sum is σ = 32777809920. Its totient is φ = 2716274880.

The previous prime is 11916972689. The next prime is 11916972703. The reversal of 11916972690 is 9627961911.

It is a super-2 number, since 2×11916972690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3646 + ... + 154425.

It is an arithmetic number, because the mean of its divisors is an integer number (512153280).

Almost surely, 2^11916972690 is an apocalyptic number.

11916972690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11916972690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16388904960).

11916972690 is an abundant number, since it is smaller than the sum of its proper divisors (20860837230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11916972690 is a wasteful number, since it uses less digits than its factorization.

11916972690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158447.

The product of its (nonzero) digits is 367416, while the sum is 51.

The spelling of 11916972690 in words is "eleven billion, nine hundred sixteen million, nine hundred seventy-two thousand, six hundred ninety".