641995948 has 12 divisors (see below), whose sum is σ = 1225628712. Its totient is φ = 291816320.

The previous prime is 641995927. The next prime is 641995961. The reversal of 641995948 is 849599146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7295365 + ... + 7295452.

It is an arithmetic number, because the mean of its divisors is an integer number (102135726).

Almost surely, 2^641995948 is an apocalyptic number.

It is an amenable number.

641995948 is a deficient number, since it is larger than the sum of its proper divisors (583632764).

641995948 is a wasteful number, since it uses less digits than its factorization.

641995948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14590832 (or 14590830 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 55.

The square root of 641995948 is about 25337.6389586717. The cubic root of 641995948 is about 862.6688087425.

The spelling of 641995948 in words is "six hundred forty-one million, nine hundred ninety-five thousand, nine hundred forty-eight".