675516717581 has 2 divisors, whose sum is σ = 675516717582. Its totient is φ = 675516717580.

The previous prime is 675516717511. The next prime is 675516717599. The reversal of 675516717581 is 185717615576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382474218025 + 293042499556 = 618445^2 + 541334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-675516717581 is a prime.

It is a super-2 number, since 2×675516717581² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 675516717581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (675516717511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337758358790 + 337758358791.

It is an arithmetic number, because the mean of its divisors is an integer number (337758358791).

Almost surely, 2^675516717581 is an apocalyptic number.

It is an amenable number.

675516717581 is a deficient number, since it is larger than the sum of its proper divisors (1).

675516717581 is an equidigital number, since it uses as much as digits as its factorization.

675516717581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12348000, while the sum is 59.

The spelling of 675516717581 in words is "six hundred seventy-five billion, five hundred sixteen million, seven hundred seventeen thousand, five hundred eighty-one".