641366223572 has 24 divisors (see below), whose sum is σ = 1188464273640. Its totient is φ = 301806602240.

The previous prime is 641366223571. The next prime is 641366223577. The reversal of 641366223572 is 275322663146.

It can be written as a sum of positive squares in 4 ways, for example, as 24472222096 + 616894001476 = 156436^2 + 785426^2 .

It is a super-2 number, since 2×641366223572² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641366223571) 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, 1524122 + ... + 1898862.

It is an arithmetic number, because the mean of its divisors is an integer number (49519344735).

Almost surely, 2^641366223572 is an apocalyptic number.

It is an amenable number.

641366223572 is a deficient number, since it is larger than the sum of its proper divisors (547098050068).

641366223572 is a wasteful number, since it uses less digits than its factorization.

641366223572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399931 (or 399929 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 47.

The spelling of 641366223572 in words is "six hundred forty-one billion, three hundred sixty-six million, two hundred twenty-three thousand, five hundred seventy-two".