161099137253 has 8 divisors (see below), whose sum is σ = 166467177216. Its totient is φ = 155741803200.

The previous prime is 161099137249. The next prime is 161099137267. The reversal of 161099137253 is 352731990161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161099137253 - 2² = 161099137249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161099137198 and 161099137207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161099137223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2645876 + ... + 2706077.

It is an arithmetic number, because the mean of its divisors is an integer number (20808397152).

Almost surely, 2^161099137253 is an apocalyptic number.

It is an amenable number.

161099137253 is a deficient number, since it is larger than the sum of its proper divisors (5368039963).

161099137253 is an equidigital number, since it uses as much as digits as its factorization.

161099137253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352955.

The product of its (nonzero) digits is 306180, while the sum is 47.

The spelling of 161099137253 in words is "one hundred sixty-one billion, ninety-nine million, one hundred thirty-seven thousand, two hundred fifty-three".