649899195 has 16 divisors (see below), whose sum is σ = 1134369792. Its totient is φ = 315102560.

The previous prime is 649899181. The next prime is 649899209. The reversal of 649899195 is 591998946.

It is an interprime number because it is at equal distance from previous prime (649899181) and next prime (649899209).

It is a de Polignac number, because none of the positive numbers 2^k-649899195 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1969227 + ... + 1969556.

It is an arithmetic number, because the mean of its divisors is an integer number (70898112).

Almost surely, 2^649899195 is an apocalyptic number.

649899195 is a deficient number, since it is larger than the sum of its proper divisors (484470597).

649899195 is a wasteful number, since it uses less digits than its factorization.

649899195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938802.

The product of its digits is 6298560, while the sum is 60.

The square root of 649899195 is about 25493.1205426091. The cubic root of 649899195 is about 866.1943229063.

The spelling of 649899195 in words is "six hundred forty-nine million, eight hundred ninety-nine thousand, one hundred ninety-five".