165652156562551 has 2 divisors, whose sum is σ = 165652156562552. Its totient is φ = 165652156562550.

The previous prime is 165652156562539. The next prime is 165652156562573. The reversal of 165652156562551 is 155265651256561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165652156562551 - 2¹³ = 165652156554359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165652156562551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165652156565551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82826078281275 + 82826078281276.

It is an arithmetic number, because the mean of its divisors is an integer number (82826078281276).

Almost surely, 2^{165652156562551} is an apocalyptic number.

165652156562551 is a deficient number, since it is larger than the sum of its proper divisors (1).

165652156562551 is an equidigital number, since it uses as much as digits as its factorization.

165652156562551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000000, while the sum is 61.

The spelling of 165652156562551 in words is "one hundred sixty-five trillion, six hundred fifty-two billion, one hundred fifty-six million, five hundred sixty-two thousand, five hundred fifty-one".