11361663756521 has 8 divisors (see below), whose sum is σ = 12236178675840. Its totient is φ = 10487226092112.

The previous prime is 11361663756439. The next prime is 11361663756551. The reversal of 11361663756521 is 12565736616311.

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 11361663756521 - 2³⁸ = 11086785849577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11361663756551) 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, 19008095 + ... + 19596708.

It is an arithmetic number, because the mean of its divisors is an integer number (1529522334480).

Almost surely, 2^{11361663756521} is an apocalyptic number.

It is an amenable number.

11361663756521 is a deficient number, since it is larger than the sum of its proper divisors (874514919319).

11361663756521 is a wasteful number, since it uses less digits than its factorization.

11361663756521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38627455.

The product of its digits is 4082400, while the sum is 53.

The spelling of 11361663756521 in words is "eleven trillion, three hundred sixty-one billion, six hundred sixty-three million, seven hundred fifty-six thousand, five hundred twenty-one".