161756050720 has 96 divisors (see below), whose sum is σ = 430337650176. Its totient is φ = 56922931200.

The previous prime is 161756050717. The next prime is 161756050777. The reversal of 161756050720 is 27050657161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1427809 + ... + 1536928.

It is an arithmetic number, because the mean of its divisors is an integer number (4482683856).

Almost surely, 2^161756050720 is an apocalyptic number.

161756050720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161756050720 is an abundant number, since it is smaller than the sum of its proper divisors (268581599456).

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

161756050720 is a wasteful number, since it uses less digits than its factorization.

161756050720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964794 (or 2964786 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 161756050720 in words is "one hundred sixty-one billion, seven hundred fifty-six million, fifty thousand, seven hundred twenty".