161500134140 has 24 divisors (see below), whose sum is σ = 357000297360. Its totient is φ = 61200050688.

The previous prime is 161500134091. The next prime is 161500134223. The reversal of 161500134140 is 41431005161.

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, 212499797 + ... + 212500556.

It is an arithmetic number, because the mean of its divisors is an integer number (14875012390).

Almost surely, 2^161500134140 is an apocalyptic number.

161500134140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161500134140 is an abundant number, since it is smaller than the sum of its proper divisors (195500163220).

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

161500134140 is a wasteful number, since it uses less digits than its factorization.

161500134140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425000381 (or 425000379 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 161500134140 in words is "one hundred sixty-one billion, five hundred million, one hundred thirty-four thousand, one hundred forty".