640146299 has 8 divisors (see below), whose sum is σ = 689616480. Its totient is φ = 590708736.

The previous prime is 640146293. The next prime is 640146317. The reversal of 640146299 is 992641046.

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

It is a cyclic number.

It is not a de Polignac number, because 640146299 - 2¹² = 640142203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640146293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45947 + ... + 58235.

It is an arithmetic number, because the mean of its divisors is an integer number (86202060).

Almost surely, 2^640146299 is an apocalyptic number.

640146299 is a deficient number, since it is larger than the sum of its proper divisors (49470181).

640146299 is a wasteful number, since it uses less digits than its factorization.

640146299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16309.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 640146299 is about 25301.1126039943. The cubic root of 640146299 is about 861.8395359350.

The spelling of 640146299 in words is "six hundred forty million, one hundred forty-six thousand, two hundred ninety-nine".