85183700561 has 2 divisors, whose sum is σ = 85183700562. Its totient is φ = 85183700560.

The previous prime is 85183700533. The next prime is 85183700617. The reversal of 85183700561 is 16500738158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69920580625 + 15263119936 = 264425^2 + 123544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85183700561 is a prime.

It is a super-2 number, since 2×85183700561² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85183700501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42591850280 + 42591850281.

It is an arithmetic number, because the mean of its divisors is an integer number (42591850281).

Almost surely, 2^85183700561 is an apocalyptic number.

It is an amenable number.

85183700561 is a deficient number, since it is larger than the sum of its proper divisors (1).

85183700561 is an equidigital number, since it uses as much as digits as its factorization.

85183700561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 44.

The spelling of 85183700561 in words is "eighty-five billion, one hundred eighty-three million, seven hundred thousand, five hundred sixty-one".