161145677080 has 64 divisors (see below), whose sum is σ = 366513336000. Its totient is φ = 63759335424.

The previous prime is 161145677051. The next prime is 161145677083. The reversal of 161145677080 is 80776541161.

It is a self number, because there is not a number n which added to its sum of digits gives 161145677080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161145677083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7901136 + ... + 7921504.

It is an arithmetic number, because the mean of its divisors is an integer number (5726770875).

Almost surely, 2^161145677080 is an apocalyptic number.

161145677080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161145677080 is an abundant number, since it is smaller than the sum of its proper divisors (205367658920).

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

161145677080 is a wasteful number, since it uses less digits than its factorization.

161145677080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22516 (or 22512 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 161145677080 in words is "one hundred sixty-one billion, one hundred forty-five million, six hundred seventy-seven thousand, eighty".