861316514059601 has 4 divisors (see below), whose sum is σ = 861324455716452. Its totient is φ = 861308572402752.

The previous prime is 861316514059579. The next prime is 861316514059609. The reversal of 861316514059601 is 106950415613168.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 700131652920001 + 161184861139600 = 26460001^2 + 12695860^2 .

It is a cyclic number.

It is not a de Polignac number, because 861316514059601 - 2⁶ = 861316514059537 is a prime.

It is a super-2 number, since 2×861316514059601² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861316514059609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3970665740 + ... + 3970882653.

It is an arithmetic number, because the mean of its divisors is an integer number (215331113929113).

Almost surely, 2^{861316514059601} is an apocalyptic number.

It is an amenable number.

861316514059601 is a deficient number, since it is larger than the sum of its proper divisors (7941656851).

861316514059601 is a wasteful number, since it uses less digits than its factorization.

861316514059601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7941656850.

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 861316514059601 in words is "eight hundred sixty-one trillion, three hundred sixteen billion, five hundred fourteen million, fifty-nine thousand, six hundred one".