11561216664001 has 8 divisors (see below), whose sum is σ = 12698819219520. Its totient is φ = 10476525855312.

The previous prime is 11561216663993. The next prime is 11561216664017. The reversal of 11561216664001 is 10046661216511.

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

It is not a de Polignac number, because 11561216664001 - 2³ = 11561216663993 is a prime.

It is a super-2 number, since 2×11561216664001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11561216664061) 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, 13227936250 + ... + 13227937123.

It is an arithmetic number, because the mean of its divisors is an integer number (1587352402440).

Almost surely, 2^{11561216664001} is an apocalyptic number.

It is an amenable number.

11561216664001 is a deficient number, since it is larger than the sum of its proper divisors (1137602555519).

11561216664001 is a wasteful number, since it uses less digits than its factorization.

11561216664001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26455873415.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 11561216664001 in words is "eleven trillion, five hundred sixty-one billion, two hundred sixteen million, six hundred sixty-four thousand, one".