11637141921 has 12 divisors (see below), whose sum is σ = 16810141348. Its totient is φ = 7757662464.

The previous prime is 11637141829. The next prime is 11637141931. The reversal of 11637141921 is 12914173611.

11637141921 is a `hidden beast` number, since 1 + 1 + 637 + 1 + 4 + 19 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3374331921 + 8262810000 = 58089^2 + 90900^2 .

It is not a de Polignac number, because 11637141921 - 2¹⁴ = 11637125537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11637141931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287301 + ... + 325293.

Almost surely, 2^11637141921 is an apocalyptic number.

It is an amenable number.

11637141921 is a deficient number, since it is larger than the sum of its proper divisors (5172999427).

11637141921 is a wasteful number, since it uses less digits than its factorization.

11637141921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72032 (or 72029 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The spelling of 11637141921 in words is "eleven billion, six hundred thirty-seven million, one hundred forty-one thousand, nine hundred twenty-one".