646838022241874 has 8 divisors (see below), whose sum is σ = 970257495760380. Its totient is φ = 323418856988416.

The previous prime is 646838022241867. The next prime is 646838022241883. The reversal of 646838022241874 is 478142220838646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 597794822724649 + 49043199517225 = 24449843^2 + 7003085^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 646838022241874.

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, 71747039 + ... + 80257794.

Almost surely, 2^{646838022241874} is an apocalyptic number.

646838022241874 is a deficient number, since it is larger than the sum of its proper divisors (323419473518506).

646838022241874 is a wasteful number, since it uses less digits than its factorization.

646838022241874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154132524.

The product of its (nonzero) digits is 198180864, while the sum is 65.

The spelling of 646838022241874 in words is "six hundred forty-six trillion, eight hundred thirty-eight billion, twenty-two million, two hundred forty-one thousand, eight hundred seventy-four".