641542245146 has 24 divisors (see below), whose sum is σ = 1075089583092. Its totient is φ = 286829611200.

The previous prime is 641542245101. The next prime is 641542245151.

641542245146 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 600803263225 + 40738981921 = 775115^2 + 201839^2 .

It is a super-2 number, since 2×641542245146² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 641542245097 and 641542245106.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21714755 + ... + 21744278.

Almost surely, 2^641542245146 is an apocalyptic number.

641542245146 is a deficient number, since it is larger than the sum of its proper divisors (433547337946).

641542245146 is a wasteful number, since it uses less digits than its factorization.

641542245146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43459118 (or 43459107 counting only the distinct ones).

The product of its digits is 921600, while the sum is 44.

It can be divided in two parts, 641542 and 245146, that added together give a palindrome (886688).

The spelling of 641542245146 in words is "six hundred forty-one billion, five hundred forty-two million, two hundred forty-five thousand, one hundred forty-six".