641929146 has 16 divisors (see below), whose sum is σ = 1359379584. Its totient is φ = 201389504.

The previous prime is 641929139. The next prime is 641929147.

641929146 is nontrivially palindromic in base 10.

641929146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 641929098 and 641929107.

It is not an unprimeable number, because it can be changed into a prime (641929147) 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, 3146610 + ... + 3146813.

It is an arithmetic number, because the mean of its divisors is an integer number (84961224).

Almost surely, 2^641929146 is an apocalyptic number.

641929146 is an abundant number, since it is smaller than the sum of its proper divisors (717450438).

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

641929146 is a wasteful number, since it uses less digits than its factorization.

641929146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293445.

The product of its digits is 93312, while the sum is 42.

The square root of 641929146 is about 25336.3206878978. The cubic root of 641929146 is about 862.6388864349.

The spelling of 641929146 in words is "six hundred forty-one million, nine hundred twenty-nine thousand, one hundred forty-six".