145644899 has 8 divisors (see below), whose sum is σ = 162329040. Its totient is φ = 129862656.

The previous prime is 145644893. The next prime is 145644923. The reversal of 145644899 is 998446541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145644899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145644893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225134 + ... + 225779.

It is an arithmetic number, because the mean of its divisors is an integer number (20291130).

Almost surely, 2^145644899 is an apocalyptic number.

145644899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

145644899 is a deficient number, since it is larger than the sum of its proper divisors (16684141).

145644899 is a wasteful number, since it uses less digits than its factorization.

145644899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450949.

The product of its digits is 1244160, while the sum is 50.

The square root of 145644899 is about 12068.3428439865. The cubic root of 145644899 is about 526.1364937068.

The spelling of 145644899 in words is "one hundred forty-five million, six hundred forty-four thousand, eight hundred ninety-nine".