645189514 has 8 divisors (see below), whose sum is σ = 1009861920. Its totient is φ = 308568876.

The previous prime is 645189509. The next prime is 645189547. The reversal of 645189514 is 415981546.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7012884 + ... + 7012975.

It is an arithmetic number, because the mean of its divisors is an integer number (126232740).

Almost surely, 2^645189514 is an apocalyptic number.

645189514 is a deficient number, since it is larger than the sum of its proper divisors (364672406).

645189514 is a wasteful number, since it uses less digits than its factorization.

645189514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14025884.

The product of its digits is 172800, while the sum is 43.

The square root of 645189514 is about 25400.5809776076. The cubic root of 645189514 is about 864.0968728901.

The spelling of 645189514 in words is "six hundred forty-five million, one hundred eighty-nine thousand, five hundred fourteen".