161767660808620 has 48 divisors (see below), whose sum is σ = 357791780021760. Its totient is φ = 61267125000384.

The previous prime is 161767660808521. The next prime is 161767660808627. The reversal of 161767660808620 is 26808066767161.

It is a super-2 number, since 2×161767660808620² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161767660808627) 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, 118432404 + ... + 119790523.

It is an arithmetic number, because the mean of its divisors is an integer number (7453995417120).

Almost surely, 2^{161767660808620} is an apocalyptic number.

161767660808620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161767660808620 is an abundant number, since it is smaller than the sum of its proper divisors (196024119213140).

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

161767660808620 is a wasteful number, since it uses less digits than its factorization.

161767660808620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238224742 (or 238224740 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 64.

The spelling of 161767660808620 in words is "one hundred sixty-one trillion, seven hundred sixty-seven billion, six hundred sixty million, eight hundred eight thousand, six hundred twenty".