646312742662 has 8 divisors (see below), whose sum is σ = 981149465016. Its totient is φ = 319262920992.

The previous prime is 646312742633. The next prime is 646312742707. The reversal of 646312742662 is 266247213646.

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

It is a super-2 number, since 2×646312742662² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946724963 + ... + 1946725294.

It is an arithmetic number, because the mean of its divisors is an integer number (122643683127).

Almost surely, 2^646312742662 is an apocalyptic number.

646312742662 is a deficient number, since it is larger than the sum of its proper divisors (334836722354).

646312742662 is a wasteful number, since it uses less digits than its factorization.

646312742662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893450342.

The product of its digits is 3483648, while the sum is 49.

The spelling of 646312742662 in words is "six hundred forty-six billion, three hundred twelve million, seven hundred forty-two thousand, six hundred sixty-two".