11562721399 has 8 divisors (see below), whose sum is σ = 12037628160. Its totient is φ = 11092894176.

The previous prime is 11562721397. The next prime is 11562721427. The reversal of 11562721399 is 99312726511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11562721399 - 2¹ = 11562721397 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 (11562721397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265239 + ... + 1274344.

It is an arithmetic number, because the mean of its divisors is an integer number (1504703520).

Almost surely, 2^11562721399 is an apocalyptic number.

11562721399 is a deficient number, since it is larger than the sum of its proper divisors (474906761).

11562721399 is a wasteful number, since it uses less digits than its factorization.

11562721399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539769.

The product of its digits is 204120, while the sum is 46.

It can be divided in two parts, 115627 and 21399, that added together give a triangular number (137026 = T₅₂₃).

The spelling of 11562721399 in words is "eleven billion, five hundred sixty-two million, seven hundred twenty-one thousand, three hundred ninety-nine".