6459903389956 has 9 divisors (see below), whose sum is σ = 11304839828149. Its totient is φ = 3229949153344.

The previous prime is 6459903389941. The next prime is 6459903389977. The reversal of 6459903389956 is 6599833099546.

The square root of 6459903389956 is 2541634.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 605361802500 + 5854541587456 = 778050^2 + 2419616^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4447860 + ... + 5718676.

Almost surely, 2^{6459903389956} is an apocalyptic number.

6459903389956 is the 2541634-th square number.

It is an amenable number.

6459903389956 is a deficient number, since it is larger than the sum of its proper divisors (4844936438193).

6459903389956 is an frugal number, since it uses more digits than its factorization.

6459903389956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541638 (or 1270819 counting only the distinct ones).

The product of its (nonzero) digits is 1700611200, while the sum is 76.

The spelling of 6459903389956 in words is "six trillion, four hundred fifty-nine billion, nine hundred three million, three hundred eighty-nine thousand, nine hundred fifty-six".