165702180551 has 2 divisors, whose sum is σ = 165702180552. Its totient is φ = 165702180550.

The previous prime is 165702180443. The next prime is 165702180563. The reversal of 165702180551 is 155081207561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165702180551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165702180499 and 165702180508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165702180571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82851090275 + 82851090276.

It is an arithmetic number, because the mean of its divisors is an integer number (82851090276).

Almost surely, 2^165702180551 is an apocalyptic number.

165702180551 is a deficient number, since it is larger than the sum of its proper divisors (1).

165702180551 is an equidigital number, since it uses as much as digits as its factorization.

165702180551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 41.

The spelling of 165702180551 in words is "one hundred sixty-five billion, seven hundred two million, one hundred eighty thousand, five hundred fifty-one".