145680891 has 16 divisors (see below), whose sum is σ = 201257760. Its totient is φ = 93623040.

The previous prime is 145680883. The next prime is 145680893. The reversal of 145680891 is 198086541.

It is not a de Polignac number, because 145680891 - 2³ = 145680883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145680893) 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, 89061 + ... + 90681.

It is an arithmetic number, because the mean of its divisors is an integer number (12578610).

Almost surely, 2^145680891 is an apocalyptic number.

145680891 is a deficient number, since it is larger than the sum of its proper divisors (55576869).

145680891 is a wasteful number, since it uses less digits than its factorization.

145680891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 145680891 is about 12069.8339259494. The cubic root of 145680891 is about 526.1798300340.

The spelling of 145680891 in words is "one hundred forty-five million, six hundred eighty thousand, eight hundred ninety-one".