161877612 has 24 divisors (see below), whose sum is σ = 406769776. Its totient is φ = 49808448.

The previous prime is 161877607. The next prime is 161877619. The reversal of 161877612 is 216778161.

It is a super-2 number, since 2×161877612² = 52408722533645088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (161877619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518683 + ... + 518994.

Almost surely, 2^161877612 is an apocalyptic number.

161877612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161877612 is an abundant number, since it is smaller than the sum of its proper divisors (244892164).

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

161877612 is a wasteful number, since it uses less digits than its factorization.

161877612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037697 (or 1037695 counting only the distinct ones).

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

The square root of 161877612 is about 12723.1132982458. The cubic root of 161877612 is about 544.9988631685.

The spelling of 161877612 in words is "one hundred sixty-one million, eight hundred seventy-seven thousand, six hundred twelve".