641051956 has 12 divisors (see below), whose sum is σ = 1122905700. Its totient is φ = 320221760.

The previous prime is 641051953. The next prime is 641052011. The reversal of 641051956 is 659150146.

641051956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 412739856 + 228312100 = 20316^2 + 15110^2 .

It is a super-2 number, since 2×641051956² = 821895220582851872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641051953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71281 + ... + 79768.

It is an arithmetic number, because the mean of its divisors is an integer number (93575475).

Almost surely, 2^641051956 is an apocalyptic number.

It is an amenable number.

641051956 is a deficient number, since it is larger than the sum of its proper divisors (481853744).

641051956 is a wasteful number, since it uses less digits than its factorization.

641051956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152114 (or 152112 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 641051956 is about 25319.0038508627. The cubic root of 641051956 is about 862.2457780755.

The spelling of 641051956 in words is "six hundred forty-one million, fifty-one thousand, nine hundred fifty-six".