641764144631 has 8 divisors (see below), whose sum is σ = 669712497120. Its totient is φ = 613819589152.

The previous prime is 641764144613. The next prime is 641764144711. The reversal of 641764144631 is 136441467146.

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

It is not a de Polignac number, because 641764144631 - 2³⁸ = 366886237687 is a prime.

It is a super-2 number, since 2×641764144631² (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 (641764144331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601136 + ... + 1282533.

It is an arithmetic number, because the mean of its divisors is an integer number (83714062140).

Almost surely, 2^641764144631 is an apocalyptic number.

641764144631 is a deficient number, since it is larger than the sum of its proper divisors (27948352489).

641764144631 is a wasteful number, since it uses less digits than its factorization.

641764144631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898505.

The product of its digits is 1161216, while the sum is 47.

The spelling of 641764144631 in words is "six hundred forty-one billion, seven hundred sixty-four million, one hundred forty-four thousand, six hundred thirty-one".