641770265331 has 12 divisors (see below), whose sum is σ = 998309301808. Its totient is φ = 394935547824.

The previous prime is 641770265219. The next prime is 641770265347. The reversal of 641770265331 is 133562077146.

641770265331 is a `hidden beast` number, since 6 + 41 + 7 + 70 + 2 + 6 + 533 + 1 = 666.

It is not a de Polignac number, because 641770265331 - 2⁷ = 641770265203 is a prime.

It is a super-2 number, since 2×641770265331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641770263331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2742607855 + ... + 2742608088.

Almost surely, 2^641770265331 is an apocalyptic number.

641770265331 is a deficient number, since it is larger than the sum of its proper divisors (356539036477).

641770265331 is a wasteful number, since it uses less digits than its factorization.

641770265331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485215962 (or 5485215959 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 641770265331 in words is "six hundred forty-one billion, seven hundred seventy million, two hundred sixty-five thousand, three hundred thirty-one".