11777037021 has 6 divisors (see below), whose sum is σ = 17011275710. Its totient is φ = 7851358008.

The previous prime is 11777036987. The next prime is 11777037049. The reversal of 11777037021 is 12073077711.

It can be written as a sum of positive squares in only one way, i.e., 10833687225 + 943349796 = 104085^2 + 30714^2 .

It is not a de Polignac number, because 11777037021 - 2¹⁹ = 11776512733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11777037061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654279826 + ... + 654279843.

Almost surely, 2^11777037021 is an apocalyptic number.

It is an amenable number.

11777037021 is a deficient number, since it is larger than the sum of its proper divisors (5234238689).

11777037021 is a wasteful number, since it uses less digits than its factorization.

11777037021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308559675 (or 1308559672 counting only the distinct ones).

The product of its (nonzero) digits is 14406, while the sum is 36.

The spelling of 11777037021 in words is "eleven billion, seven hundred seventy-seven million, thirty-seven thousand, twenty-one".