161358494953 has 4 divisors (see below), whose sum is σ = 161360016768. Its totient is φ = 161356973140.

The previous prime is 161358494923. The next prime is 161358494959. The reversal of 161358494953 is 359494853161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161358494953 - 2³³ = 152768560361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161358494959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588901 + ... + 818242.

It is an arithmetic number, because the mean of its divisors is an integer number (40340004192).

Almost surely, 2^161358494953 is an apocalyptic number.

It is an amenable number.

161358494953 is a deficient number, since it is larger than the sum of its proper divisors (1521815).

161358494953 is a wasteful number, since it uses less digits than its factorization.

161358494953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521814.

The product of its digits is 13996800, while the sum is 58.

The spelling of 161358494953 in words is "one hundred sixty-one billion, three hundred fifty-eight million, four hundred ninety-four thousand, nine hundred fifty-three".