11990381467809 has 32 divisors (see below), whose sum is σ = 16905570038784. Its totient is φ = 7543937903040.

The previous prime is 11990381467807. The next prime is 11990381467859. The reversal of 11990381467809 is 90876418309911.

It is not a de Polignac number, because 11990381467809 - 2¹ = 11990381467807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11990381467809.

It is not an unprimeable number, because it can be changed into a prime (11990381467807) 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, 2952474 + ... + 5718204.

It is an arithmetic number, because the mean of its divisors is an integer number (528299063712).

Almost surely, 2^{11990381467809} is an apocalyptic number.

It is an amenable number.

11990381467809 is a deficient number, since it is larger than the sum of its proper divisors (4915188570975).

11990381467809 is a wasteful number, since it uses less digits than its factorization.

11990381467809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766597.

The product of its (nonzero) digits is 23514624, while the sum is 66.

The spelling of 11990381467809 in words is "eleven trillion, nine hundred ninety billion, three hundred eighty-one million, four hundred sixty-seven thousand, eight hundred nine".