161420491371 has 16 divisors (see below), whose sum is σ = 221217567264. Its totient is φ = 104623098624.

The previous prime is 161420491367. The next prime is 161420491373. The reversal of 161420491371 is 173194024161.

It is not a de Polignac number, because 161420491371 - 2² = 161420491367 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161420491373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427650 + ... + 711143.

It is an arithmetic number, because the mean of its divisors is an integer number (13826097954).

Almost surely, 2^161420491371 is an apocalyptic number.

161420491371 is a deficient number, since it is larger than the sum of its proper divisors (59797075893).

161420491371 is a wasteful number, since it uses less digits than its factorization.

161420491371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140110.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 161420491371 in words is "one hundred sixty-one billion, four hundred twenty million, four hundred ninety-one thousand, three hundred seventy-one".