161506012 has 24 divisors (see below), whose sum is σ = 286322400. Its totient is φ = 79706880.

The previous prime is 161505997. The next prime is 161506013. The reversal of 161506012 is 210605161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161506013) 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, 108312 + ... + 109792.

It is an arithmetic number, because the mean of its divisors is an integer number (11930100).

Almost surely, 2^161506012 is an apocalyptic number.

It is an amenable number.

161506012 is a deficient number, since it is larger than the sum of its proper divisors (124816388).

161506012 is a wasteful number, since it uses less digits than its factorization.

161506012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 161506012 is about 12708.5015639138. The cubic root of 161506012 is about 544.5815175375.

The spelling of 161506012 in words is "one hundred sixty-one million, five hundred six thousand, twelve".