11812461777 has 6 divisors (see below), whose sum is σ = 17062444802. Its totient is φ = 7874974512.

The previous prime is 11812461769. The next prime is 11812461809. The reversal of 11812461777 is 77716421811.

11812461777 is a `hidden beast` number, since 1 + 1 + 8 + 1 + 24 + 617 + 7 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11662056081 + 150405696 = 107991^2 + 12264^2 .

It is not a de Polignac number, because 11812461777 - 2³ = 11812461769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11812461707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656247868 + ... + 656247885.

Almost surely, 2^11812461777 is an apocalyptic number.

It is an amenable number.

11812461777 is a deficient number, since it is larger than the sum of its proper divisors (5249983025).

11812461777 is a wasteful number, since it uses less digits than its factorization.

11812461777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312495759 (or 1312495756 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The spelling of 11812461777 in words is "eleven billion, eight hundred twelve million, four hundred sixty-one thousand, seven hundred seventy-seven".