11764115621 has 2 divisors, whose sum is σ = 11764115622. Its totient is φ = 11764115620.

The previous prime is 11764115567. The next prime is 11764115653. The reversal of 11764115621 is 12651146711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8838820225 + 2925295396 = 94015^2 + 54086^2 .

It is a cyclic number.

It is not a de Polignac number, because 11764115621 - 2³⁰ = 10690373797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11764115681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5882057810 + 5882057811.

It is an arithmetic number, because the mean of its divisors is an integer number (5882057811).

Almost surely, 2^11764115621 is an apocalyptic number.

It is an amenable number.

11764115621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11764115621 is an equidigital number, since it uses as much as digits as its factorization.

11764115621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The spelling of 11764115621 in words is "eleven billion, seven hundred sixty-four million, one hundred fifteen thousand, six hundred twenty-one".