161767812 has 24 divisors (see below), whose sum is σ = 378464800. Its totient is φ = 53778816.

The previous prime is 161767799. The next prime is 161767813. The reversal of 161767812 is 218767161.

It is not an unprimeable number, because it can be changed into a prime (161767813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13237 + ... + 22332.

Almost surely, 2^161767812 is an apocalyptic number.

161767812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161767812 is an abundant number, since it is smaller than the sum of its proper divisors (216696988).

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

161767812 is a wasteful number, since it uses less digits than its factorization.

161767812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35955 (or 35953 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The square root of 161767812 is about 12718.7975846776. The cubic root of 161767812 is about 544.8756128327.

The spelling of 161767812 in words is "one hundred sixty-one million, seven hundred sixty-seven thousand, eight hundred twelve".