161236746 has 24 divisors (see below), whose sum is σ = 381105504. Its totient is φ = 48859560.

The previous prime is 161236741. The next prime is 161236763. The reversal of 161236746 is 647632161.

It is a happy number.

161236746 is a `hidden beast` number, since 1 + 612 + 36 + 7 + 4 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 161236746.

It is not an unprimeable number, because it can be changed into a prime (161236741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406966 + ... + 407361.

It is an arithmetic number, because the mean of its divisors is an integer number (15879396).

Almost surely, 2^161236746 is an apocalyptic number.

161236746 is an abundant number, since it is smaller than the sum of its proper divisors (219868758).

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

161236746 is a wasteful number, since it uses less digits than its factorization.

161236746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814346 (or 814343 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 161236746 is about 12697.9032127356. The cubic root of 161236746 is about 544.2787035166.

The spelling of 161236746 in words is "one hundred sixty-one million, two hundred thirty-six thousand, seven hundred forty-six".