161025924869 has 2 divisors, whose sum is σ = 161025924870. Its totient is φ = 161025924868.

The previous prime is 161025924853. The next prime is 161025924937. The reversal of 161025924869 is 968429520161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135446080900 + 25579843969 = 368030^2 + 159937^2 .

It is an emirp because it is prime and its reverse (968429520161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161025924869 - 2⁴ = 161025924853 is a prime.

It is a super-2 number, since 2×161025924869² (a number of 23 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 161025924869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161025924769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80512962434 + 80512962435.

It is an arithmetic number, because the mean of its divisors is an integer number (80512962435).

Almost surely, 2^161025924869 is an apocalyptic number.

It is an amenable number.

161025924869 is a deficient number, since it is larger than the sum of its proper divisors (1).

161025924869 is an equidigital number, since it uses as much as digits as its factorization.

161025924869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 161025924869 in words is "one hundred sixty-one billion, twenty-five million, nine hundred twenty-four thousand, eight hundred sixty-nine".