11601574222661 has 2 divisors, whose sum is σ = 11601574222662. Its totient is φ = 11601574222660.

The previous prime is 11601574222657. The next prime is 11601574222699. The reversal of 11601574222661 is 16622247510611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11502848812225 + 98725410436 = 3391585^2 + 314206^2 .

It is a cyclic number.

It is not a de Polignac number, because 11601574222661 - 2² = 11601574222657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11601574212661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5800787111330 + 5800787111331.

It is an arithmetic number, because the mean of its divisors is an integer number (5800787111331).

Almost surely, 2^{11601574222661} is an apocalyptic number.

It is an amenable number.

11601574222661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11601574222661 is an equidigital number, since it uses as much as digits as its factorization.

11601574222661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 11601574222661 in words is "eleven trillion, six hundred one billion, five hundred seventy-four million, two hundred twenty-two thousand, six hundred sixty-one".