161574502253 has 2 divisors, whose sum is σ = 161574502254. Its totient is φ = 161574502252.

The previous prime is 161574502231. The next prime is 161574502277. The reversal of 161574502253 is 352205475161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158096097769 + 3478404484 = 397613^2 + 58978^2 .

It is a cyclic number.

It is not a de Polignac number, because 161574502253 - 2⁸ = 161574501997 is a prime.

It is a super-2 number, since 2×161574502253² (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 161574502253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161574502213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80787251126 + 80787251127.

It is an arithmetic number, because the mean of its divisors is an integer number (80787251127).

Almost surely, 2^161574502253 is an apocalyptic number.

It is an amenable number.

161574502253 is a deficient number, since it is larger than the sum of its proper divisors (1).

161574502253 is an equidigital number, since it uses as much as digits as its factorization.

161574502253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 161574502253 in words is "one hundred sixty-one billion, five hundred seventy-four million, five hundred two thousand, two hundred fifty-three".