641922953 has 32 divisors (see below), whose sum is σ = 771916800. Its totient is φ = 522422784.

The previous prime is 641922949. The next prime is 641922977. The reversal of 641922953 is 359229146.

641922953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 641922953 - 2² = 641922949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 641922953.

It is not an unprimeable number, because it can be changed into a prime (641922943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2803043 + ... + 2803271.

It is an arithmetic number, because the mean of its divisors is an integer number (24122400).

Almost surely, 2^641922953 is an apocalyptic number.

It is an amenable number.

641922953 is a deficient number, since it is larger than the sum of its proper divisors (129993847).

641922953 is a wasteful number, since it uses less digits than its factorization.

641922953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489.

The product of its digits is 116640, while the sum is 41.

The square root of 641922953 is about 25336.1984717518. The cubic root of 641922953 is about 862.6361123282.

The spelling of 641922953 in words is "six hundred forty-one million, nine hundred twenty-two thousand, nine hundred fifty-three".