646451791410 has 32 divisors (see below), whose sum is σ = 1551570075072. Its totient is φ = 172377613760.

The previous prime is 646451791339. The next prime is 646451791463. The reversal of 646451791410 is 14197154646.

It is a self number, because there is not a number n which added to its sum of digits gives 646451791410.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35349 + ... + 1137608.

It is an arithmetic number, because the mean of its divisors is an integer number (48486564846).

Almost surely, 2^646451791410 is an apocalyptic number.

646451791410 is an abundant number, since it is smaller than the sum of its proper divisors (905118283662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646451791410 is a wasteful number, since it uses less digits than its factorization.

646451791410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191338.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 646451791410 in words is "six hundred forty-six billion, four hundred fifty-one million, seven hundred ninety-one thousand, four hundred ten".