161445878 has 32 divisors (see below), whose sum is σ = 277627392. Its totient is φ = 69696000.

The previous prime is 161445877. The next prime is 161445887. The reversal of 161445878 is 878544161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161445877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75350 + ... + 77462.

It is an arithmetic number, because the mean of its divisors is an integer number (8675856).

Almost surely, 2^161445878 is an apocalyptic number.

161445878 is a deficient number, since it is larger than the sum of its proper divisors (116181514).

161445878 is a wasteful number, since it uses less digits than its factorization.

161445878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300.

The product of its digits is 215040, while the sum is 44.

The square root of 161445878 is about 12706.1354470980. The cubic root of 161445878 is about 544.5139206107.

It can be divided in two parts, 16144 and 5878, that added together give a palindrome (22022).

The spelling of 161445878 in words is "one hundred sixty-one million, four hundred forty-five thousand, eight hundred seventy-eight".