641215624546 has 12 divisors (see below), whose sum is σ = 1118855834838. Its totient is φ = 274806696192.

The previous prime is 641215624537. The next prime is 641215624549. The reversal of 641215624546 is 645426512146.

It can be written as a sum of positive squares in only one way, i.e., 558141973921 + 83073650625 = 747089^2 + 288225^2 .

It is a super-2 number, since 2×641215624546² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641215624496 and 641215624505.

It is not an unprimeable number, because it can be changed into a prime (641215624549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3271508191 + ... + 3271508386.

Almost surely, 2^641215624546 is an apocalyptic number.

641215624546 is a deficient number, since it is larger than the sum of its proper divisors (477640210292).

641215624546 is a wasteful number, since it uses less digits than its factorization.

641215624546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543016593 (or 6543016586 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 46.

The spelling of 641215624546 in words is "six hundred forty-one billion, two hundred fifteen million, six hundred twenty-four thousand, five hundred forty-six".