641730769951 has 8 divisors (see below), whose sum is σ = 642232573904. Its totient is φ = 641229099840.

The previous prime is 641730769913. The next prime is 641730769961. The reversal of 641730769951 is 159967037146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641730769951 - 2⁹ = 641730769439 is a prime.

It is a super-2 number, since 2×641730769951² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641730769961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10933555 + ... + 10992091.

It is an arithmetic number, because the mean of its divisors is an integer number (80279071738).

Almost surely, 2^641730769951 is an apocalyptic number.

641730769951 is a deficient number, since it is larger than the sum of its proper divisors (501803953).

641730769951 is a wasteful number, since it uses less digits than its factorization.

641730769951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66921.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 641730769951 in words is "six hundred forty-one billion, seven hundred thirty million, seven hundred sixty-nine thousand, nine hundred fifty-one".