161500899430 has 32 divisors (see below), whose sum is σ = 313120029600. Its totient is φ = 59620292352.

The previous prime is 161500899409. The next prime is 161500899449. The reversal of 161500899430 is 34998005161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625906 + ... + 845434.

It is an arithmetic number, because the mean of its divisors is an integer number (9785000925).

Almost surely, 2^161500899430 is an apocalyptic number.

161500899430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161500899430 is a deficient number, since it is larger than the sum of its proper divisors (151619130170).

161500899430 is a wasteful number, since it uses less digits than its factorization.

161500899430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225208.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 161500899430 in words is "one hundred sixty-one billion, five hundred million, eight hundred ninety-nine thousand, four hundred thirty".