161036251253 has 2 divisors, whose sum is σ = 161036251254. Its totient is φ = 161036251252.

The previous prime is 161036251231. The next prime is 161036251301. The reversal of 161036251253 is 352152630161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150436931044 + 10599320209 = 387862^2 + 102953^2 .

It is a cyclic number.

It is not a de Polignac number, because 161036251253 - 2²² = 161032056949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161036251223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80518125626 + 80518125627.

It is an arithmetic number, because the mean of its divisors is an integer number (80518125627).

Almost surely, 2^161036251253 is an apocalyptic number.

It is an amenable number.

161036251253 is a deficient number, since it is larger than the sum of its proper divisors (1).

161036251253 is an equidigital number, since it uses as much as digits as its factorization.

161036251253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 161036251253 in words is "one hundred sixty-one billion, thirty-six million, two hundred fifty-one thousand, two hundred fifty-three".