641219686 has 8 divisors (see below), whose sum is σ = 992856384. Its totient is φ = 310267560.

The previous prime is 641219653. The next prime is 641219767. The reversal of 641219686 is 686912146.

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

It is a super-2 number, since 2×641219686² = 822325371427877192, which contains 22 as substring.

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, 5171065 + ... + 5171188.

It is an arithmetic number, because the mean of its divisors is an integer number (124107048).

Almost surely, 2^641219686 is an apocalyptic number.

641219686 is a deficient number, since it is larger than the sum of its proper divisors (351636698).

641219686 is a wasteful number, since it uses less digits than its factorization.

641219686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342286.

The product of its digits is 124416, while the sum is 43.

The square root of 641219686 is about 25322.3159683312. The cubic root of 641219686 is about 862.3209731624.

The spelling of 641219686 in words is "six hundred forty-one million, two hundred nineteen thousand, six hundred eighty-six".