11689952785 has 20 divisors (see below), whose sum is σ = 16364976948. Its totient is φ = 8015959392.

The previous prime is 11689952779. The next prime is 11689952797. The reversal of 11689952785 is 58725998611.

It can be written as a sum of positive squares in 2 ways, for example, as 5481773521 + 6208179264 = 74039^2 + 78792^2 .

It is not a de Polignac number, because 11689952785 - 2⁹ = 11689952273 is a prime.

It is a super-2 number, since 2×11689952785² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 474874 + ... + 498883.

Almost surely, 2^11689952785 is an apocalyptic number.

It is an amenable number.

11689952785 is a deficient number, since it is larger than the sum of its proper divisors (4675024163).

11689952785 is an frugal number, since it uses more digits than its factorization.

11689952785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973790 (or 973769 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 61.

The spelling of 11689952785 in words is "eleven billion, six hundred eighty-nine million, nine hundred fifty-two thousand, seven hundred eighty-five".