64191004071639 has 8 divisors (see below), whose sum is σ = 86241348982272. Its totient is φ = 42467330937720.

The previous prime is 64191004071539. The next prime is 64191004071641. The reversal of 64191004071639 is 93617040019146.

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

It is not a de Polignac number, because 64191004071639 - 2¹⁹ = 64191003547351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64191004071591 and 64191004071600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64191004071539) 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, 81667943719 + ... + 81667944504.

It is an arithmetic number, because the mean of its divisors is an integer number (10780168622784).

Almost surely, 2^{64191004071639} is an apocalyptic number.

64191004071639 is a deficient number, since it is larger than the sum of its proper divisors (22050344910633).

64191004071639 is a wasteful number, since it uses less digits than its factorization.

64191004071639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163335888357.

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 64191004071639 in words is "sixty-four trillion, one hundred ninety-one billion, four million, seventy-one thousand, six hundred thirty-nine".