11850870691 has 8 divisors (see below), whose sum is σ = 13053740544. Its totient is φ = 10668920520.

The previous prime is 11850870671. The next prime is 11850870737. The reversal of 11850870691 is 19607805811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11850870691 - 2⁹ = 11850870179 is a prime.

It is a super-2 number, since 2×11850870691² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11850870611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5228731 + ... + 5230996.

It is an arithmetic number, because the mean of its divisors is an integer number (1631717568).

Almost surely, 2^11850870691 is an apocalyptic number.

11850870691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11850870691 is a deficient number, since it is larger than the sum of its proper divisors (1202869853).

11850870691 is a wasteful number, since it uses less digits than its factorization.

11850870691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10459841.

The product of its (nonzero) digits is 120960, while the sum is 46.

The spelling of 11850870691 in words is "eleven billion, eight hundred fifty million, eight hundred seventy thousand, six hundred ninety-one".