161840605570 has 64 divisors (see below), whose sum is σ = 335757312000. Its totient is φ = 55017593280.

The previous prime is 161840605561. The next prime is 161840605657. The reversal of 161840605570 is 75506048161.

161840605570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161840605570² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11721531 + ... + 11735329.

It is an arithmetic number, because the mean of its divisors is an integer number (5246208000).

Almost surely, 2^161840605570 is an apocalyptic number.

161840605570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161840605570 is an abundant number, since it is smaller than the sum of its proper divisors (173916706430).

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

161840605570 is a wasteful number, since it uses less digits than its factorization.

161840605570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15223.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 161840605570 in words is "one hundred sixty-one billion, eight hundred forty million, six hundred five thousand, five hundred seventy".