641512938 has 16 divisors (see below), whose sum is σ = 1399664736. Its totient is φ = 194397840.

The previous prime is 641512933. The next prime is 641512951. The reversal of 641512938 is 839215146.

It is a junction number, because it is equal to n+sod(n) for n = 641512896 and 641512905.

It is not an unprimeable number, because it can be changed into a prime (641512933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4859881 + ... + 4860012.

It is an arithmetic number, because the mean of its divisors is an integer number (87479046).

Almost surely, 2^641512938 is an apocalyptic number.

641512938 is an abundant number, since it is smaller than the sum of its proper divisors (758151798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641512938 is a wasteful number, since it uses less digits than its factorization.

641512938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9719909.

The product of its digits is 51840, while the sum is 39.

The square root of 641512938 is about 25328.1056930833. The cubic root of 641512938 is about 862.4524095564.

The spelling of 641512938 in words is "six hundred forty-one million, five hundred twelve thousand, nine hundred thirty-eight".