161500205006 has 16 divisors (see below), whose sum is σ = 278387098080. Its totient is φ = 68831972640.

The previous prime is 161500204997. The next prime is 161500205017. The reversal of 161500205006 is 600502005161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31864121 + ... + 31869188.

It is an arithmetic number, because the mean of its divisors is an integer number (17399193630).

Almost surely, 2^161500205006 is an apocalyptic number.

161500205006 is a deficient number, since it is larger than the sum of its proper divisors (116886893074).

161500205006 is a wasteful number, since it uses less digits than its factorization.

161500205006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63733499.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 161500205006 in words is "one hundred sixty-one billion, five hundred million, two hundred five thousand, six".