641906086 has 8 divisors (see below), whose sum is σ = 986343624. Its totient is φ = 313124880.

The previous prime is 641906071. The next prime is 641906093. The reversal of 641906086 is 680609146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3913980 + ... + 3914143.

It is an arithmetic number, because the mean of its divisors is an integer number (123292953).

Almost surely, 2^641906086 is an apocalyptic number.

641906086 is a deficient number, since it is larger than the sum of its proper divisors (344437538).

641906086 is a wasteful number, since it uses less digits than its factorization.

641906086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828166.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 641906086 is about 25335.8656058955. The cubic root of 641906086 is about 862.6285567949.

It can be divided in two parts, 6419060 and 86, that added together give a palindrome (6419146).

The spelling of 641906086 in words is "six hundred forty-one million, nine hundred six thousand, eighty-six".