641795620959 has 24 divisors (see below), whose sum is σ = 968653345920. Its totient is φ = 408707074512.

The previous prime is 641795620943. The next prime is 641795620993. The reversal of 641795620959 is 959026597146.

641795620959 is a `hidden beast` number, since 6 + 4 + 17 + 9 + 562 + 0 + 9 + 59 = 666.

It is not a de Polignac number, because 641795620959 - 2⁴ = 641795620943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 641795620896 and 641795620905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641795620909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1944769 + ... + 2250714.

It is an arithmetic number, because the mean of its divisors is an integer number (40360556080).

Almost surely, 2^641795620959 is an apocalyptic number.

641795620959 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

641795620959 is a deficient number, since it is larger than the sum of its proper divisors (326857724961).

641795620959 is a wasteful number, since it uses less digits than its factorization.

641795620959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196251 (or 4196248 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 63.

The spelling of 641795620959 in words is "six hundred forty-one billion, seven hundred ninety-five million, six hundred twenty thousand, nine hundred fifty-nine".