145668915 has 144 divisors (see below), whose sum is σ = 323148960. Its totient is φ = 62052480.

The previous prime is 145668899. The next prime is 145668973. The reversal of 145668915 is 519866541.

145668915 is a `hidden beast` number, since 1 + 4 + 566 + 89 + 1 + 5 = 666.

It is not a de Polignac number, because 145668915 - 2⁴ = 145668899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2387985 + ... + 2388045.

It is an arithmetic number, because the mean of its divisors is an integer number (2244090).

Almost surely, 2^145668915 is an apocalyptic number.

145668915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145668915 is an abundant number, since it is smaller than the sum of its proper divisors (177480045).

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

145668915 is a wasteful number, since it uses less digits than its factorization.

145668915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 95 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 145668915 is about 12069.3378028788. The cubic root of 145668915 is about 526.1654110706.

The spelling of 145668915 in words is "one hundred forty-five million, six hundred sixty-eight thousand, nine hundred fifteen".