161744098540 has 12 divisors (see below), whose sum is σ = 339662606976. Its totient is φ = 64697639408.

The previous prime is 161744098499. The next prime is 161744098573. The reversal of 161744098540 is 45890447161.

It is a super-2 number, since 2×161744098540² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4043602444 + ... + 4043602483.

It is an arithmetic number, because the mean of its divisors is an integer number (28305217248).

Almost surely, 2^161744098540 is an apocalyptic number.

161744098540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161744098540 is an abundant number, since it is smaller than the sum of its proper divisors (177918508436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161744098540 is a wasteful number, since it uses less digits than its factorization.

161744098540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8087204936 (or 8087204934 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 161744098540 in words is "one hundred sixty-one billion, seven hundred forty-four million, ninety-eight thousand, five hundred forty".