11652720621 has 16 divisors (see below), whose sum is σ = 16222066560. Its totient is φ = 7426327040.

The previous prime is 11652720613. The next prime is 11652720623. The reversal of 11652720621 is 12602725611.

It is a cyclic number.

It is not a de Polignac number, because 11652720621 - 2³ = 11652720613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11652720623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69685 + ... + 167813.

It is an arithmetic number, because the mean of its divisors is an integer number (1013879160).

Almost surely, 2^11652720621 is an apocalyptic number.

It is an amenable number.

11652720621 is a deficient number, since it is larger than the sum of its proper divisors (4569345939).

11652720621 is a wasteful number, since it uses less digits than its factorization.

11652720621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99876.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 11652720621 in words is "eleven billion, six hundred fifty-two million, seven hundred twenty thousand, six hundred twenty-one".