161655761012587 has 2 divisors, whose sum is σ = 161655761012588. Its totient is φ = 161655761012586.

The previous prime is 161655761012573. The next prime is 161655761012621. The reversal of 161655761012587 is 785210167556161.

It is a weak prime.

It is an emirp because it is prime and its reverse (785210167556161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161655761012587 - 2³⁵ = 161621401274219 is a prime.

It is a super-2 number, since 2×161655761012587² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161655761012287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80827880506293 + 80827880506294.

It is an arithmetic number, because the mean of its divisors is an integer number (80827880506294).

Almost surely, 2^{161655761012587} is an apocalyptic number.

161655761012587 is a deficient number, since it is larger than the sum of its proper divisors (1).

161655761012587 is an equidigital number, since it uses as much as digits as its factorization.

161655761012587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168000, while the sum is 61.

The spelling of 161655761012587 in words is "one hundred sixty-one trillion, six hundred fifty-five billion, seven hundred sixty-one million, twelve thousand, five hundred eighty-seven".