161928104590 has 32 divisors (see below), whose sum is σ = 333158099904. Its totient is φ = 55510064640.

The previous prime is 161928104567. The next prime is 161928104593. The reversal of 161928104590 is 95401829161.

It is a happy number.

It is a super-2 number, since 2×161928104590² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161928104590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161928104593) 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, 321112 + ... + 653428.

It is an arithmetic number, because the mean of its divisors is an integer number (10411190622).

Almost surely, 2^161928104590 is an apocalyptic number.

161928104590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161928104590 is an abundant number, since it is smaller than the sum of its proper divisors (171229995314).

161928104590 is a wasteful number, since it uses less digits than its factorization.

161928104590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339292.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 161928104590 in words is "one hundred sixty-one billion, nine hundred twenty-eight million, one hundred four thousand, five hundred ninety".