161698034819 has 12 divisors (see below), whose sum is σ = 171845197608. Its totient is φ = 152119046400.

The previous prime is 161698034761. The next prime is 161698034821. The reversal of 161698034819 is 918430896161.

It is not a de Polignac number, because 161698034819 - 2¹⁶ = 161697969283 is a prime.

It is a super-2 number, since 2×161698034819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161698031819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 536564 + ... + 781854.

It is an arithmetic number, because the mean of its divisors is an integer number (14320433134).

Almost surely, 2^161698034819 is an apocalyptic number.

161698034819 is a deficient number, since it is larger than the sum of its proper divisors (10147162789).

161698034819 is a wasteful number, since it uses less digits than its factorization.

161698034819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247606 (or 247589 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 161698034819 in words is "one hundred sixty-one billion, six hundred ninety-eight million, thirty-four thousand, eight hundred nineteen".