11824715621 has 2 divisors, whose sum is σ = 11824715622. Its totient is φ = 11824715620.

The previous prime is 11824715593. The next prime is 11824715629. The reversal of 11824715621 is 12651742811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11726507521 + 98208100 = 108289^2 + 9910^2 .

It is a cyclic number.

It is not a de Polignac number, because 11824715621 - 2³⁰ = 10750973797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11824715629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5912357810 + 5912357811.

It is an arithmetic number, because the mean of its divisors is an integer number (5912357811).

Almost surely, 2^11824715621 is an apocalyptic number.

It is an amenable number.

11824715621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11824715621 is an equidigital number, since it uses as much as digits as its factorization.

11824715621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 38.

The spelling of 11824715621 in words is "eleven billion, eight hundred twenty-four million, seven hundred fifteen thousand, six hundred twenty-one".