641978703339 has 8 divisors (see below), whose sum is σ = 861423653520. Its totient is φ = 425259777696.

The previous prime is 641978703283. The next prime is 641978703347. The reversal of 641978703339 is 933307879146.

It is a happy number.

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

It is not a de Polignac number, because 641978703339 - 2¹⁷ = 641978572267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641978703239) 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, 681505584 + ... + 681506525.

It is an arithmetic number, because the mean of its divisors is an integer number (107677956690).

Almost surely, 2^641978703339 is an apocalyptic number.

641978703339 is a deficient number, since it is larger than the sum of its proper divisors (219444950181).

641978703339 is a wasteful number, since it uses less digits than its factorization.

641978703339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363012269.

The product of its (nonzero) digits is 20575296, while the sum is 60.

The spelling of 641978703339 in words is "six hundred forty-one billion, nine hundred seventy-eight million, seven hundred three thousand, three hundred thirty-nine".