11655620701081 has 16 divisors (see below), whose sum is σ = 13764484039680. Its totient is φ = 9658360765440.

The previous prime is 11655620701063. The next prime is 11655620701099. The reversal of 11655620701081 is 18010702655611.

It is an interprime number because it is at equal distance from previous prime (11655620701063) and next prime (11655620701099).

It is a cyclic number.

It is not a de Polignac number, because 11655620701081 - 2¹¹ = 11655620699033 is a prime.

It is a super-2 number, since 2×11655620701081² (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 (11655620701181) 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, 27276496 + ... + 27700513.

It is an arithmetic number, because the mean of its divisors is an integer number (860280252480).

Almost surely, 2^{11655620701081} is an apocalyptic number.

It is an amenable number.

11655620701081 is a deficient number, since it is larger than the sum of its proper divisors (2108863338599).

11655620701081 is an equidigital number, since it uses as much as digits as its factorization.

11655620701081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54978024.

The product of its (nonzero) digits is 100800, while the sum is 43.

The spelling of 11655620701081 in words is "eleven trillion, six hundred fifty-five billion, six hundred twenty million, seven hundred one thousand, eighty-one".