161965760954854 has 8 divisors (see below), whose sum is σ = 255735412034040. Its totient is φ = 76720623610176.

The previous prime is 161965760954821. The next prime is 161965760954857. The reversal of 161965760954854 is 458459067569161.

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

It is a super-2 number, since 2×161965760954854² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161965760954857) 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, 2131128433579 + ... + 2131128433654.

It is an arithmetic number, because the mean of its divisors is an integer number (31966926504255).

Almost surely, 2^{161965760954854} is an apocalyptic number.

161965760954854 is a deficient number, since it is larger than the sum of its proper divisors (93769651079186).

161965760954854 is a wasteful number, since it uses less digits than its factorization.

161965760954854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262256867254.

The product of its (nonzero) digits is 1959552000, while the sum is 76.

The spelling of 161965760954854 in words is "one hundred sixty-one trillion, nine hundred sixty-five billion, seven hundred sixty million, nine hundred fifty-four thousand, eight hundred fifty-four".