161307678 has 32 divisors (see below), whose sum is σ = 373153536. Its totient is φ = 45531648.

The previous prime is 161307667. The next prime is 161307689. The reversal of 161307678 is 876703161.

It is an interprime number because it is at equal distance from previous prime (161307667) and next prime (161307689).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19651 + ... + 26622.

It is an arithmetic number, because the mean of its divisors is an integer number (11661048).

Almost surely, 2^161307678 is an apocalyptic number.

161307678 is an abundant number, since it is smaller than the sum of its proper divisors (211845858).

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

161307678 is a wasteful number, since it uses less digits than its factorization.

161307678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46368.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 161307678 is about 12700.6959651824. The cubic root of 161307678 is about 544.3585056667.

The spelling of 161307678 in words is "one hundred sixty-one million, three hundred seven thousand, six hundred seventy-eight".