641958630 has 16 divisors (see below), whose sum is σ = 1540700784. Its totient is φ = 171188960.

The previous prime is 641958623. The next prime is 641958637. The reversal of 641958630 is 36859146.

It is an interprime number because it is at equal distance from previous prime (641958623) and next prime (641958637).

It is a super-2 number, since 2×641958630² = 824221765262953800, which contains 22 as substring.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (641958637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10699281 + ... + 10699340.

It is an arithmetic number, because the mean of its divisors is an integer number (96293799).

Almost surely, 2^641958630 is an apocalyptic number.

641958630 is an abundant number, since it is smaller than the sum of its proper divisors (898742154).

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

641958630 is a wasteful number, since it uses less digits than its factorization.

641958630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21398631.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 641958630 is about 25336.9025336563. The cubic root of 641958630 is about 862.6520933211.

The spelling of 641958630 in words is "six hundred forty-one million, nine hundred fifty-eight thousand, six hundred thirty".