11656320250021 has 8 divisors (see below), whose sum is σ = 11981959479320. Its totient is φ = 11331239102208.

The previous prime is 11656320250009. The next prime is 11656320250027. The reversal of 11656320250021 is 12005202365611.

It can be written as a sum of positive squares in 4 ways, for example, as 1958614245025 + 9697706004996 = 1399505^2 + 3114114^2 .

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 11656320250021 - 2⁵ = 11656320249989 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 (11656320250027) 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, 139478016 + ... + 139561561.

It is an arithmetic number, because the mean of its divisors is an integer number (1497744934915).

Almost surely, 2^{11656320250021} is an apocalyptic number.

It is an amenable number.

11656320250021 is a deficient number, since it is larger than the sum of its proper divisors (325639229299).

11656320250021 is a wasteful number, since it uses less digits than its factorization.

11656320250021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279040743.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 11656320250021 in words is "eleven trillion, six hundred fifty-six billion, three hundred twenty million, two hundred fifty thousand, twenty-one".