145664688 has 40 divisors (see below), whose sum is σ = 405248368. Its totient is φ = 44819712.

The previous prime is 145664611. The next prime is 145664689. The reversal of 145664688 is 886466541.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (145664689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116095 + ... + 117342.

Almost surely, 2^145664688 is an apocalyptic number.

It is an amenable number.

145664688 is an abundant number, since it is smaller than the sum of its proper divisors (259583680).

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

145664688 is a wasteful number, since it uses less digits than its factorization.

145664688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233461 (or 233455 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 145664688 is about 12069.1626884387. The cubic root of 145664688 is about 526.1603216235.

The spelling of 145664688 in words is "one hundred forty-five million, six hundred sixty-four thousand, six hundred eighty-eight".