1064681403556 has 9 divisors (see below), whose sum is σ = 1863196067649. Its totient is φ = 532339669944.

The previous prime is 1064681403529. The next prime is 1064681403571. The reversal of 1064681403556 is 6553041864601.

The square root of 1064681403556 is 1031834.

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., 551142912100 + 513538491456 = 742390^2 + 716616^2 .

It is a super-2 number, since 2×1064681403556² (a number of 25 digits) contains 22 as substring.

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, 1805710 + ... + 2321626.

Almost surely, 2^{1064681403556} is an apocalyptic number.

1064681403556 is the 1031834-th square number.

It is an amenable number.

1064681403556 is a deficient number, since it is larger than the sum of its proper divisors (798514664093).

1064681403556 is an frugal number, since it uses more digits than its factorization.

1064681403556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031838 (or 515919 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

Multiplying 1064681403556 by its sum of digits (49), we get a square (52169388774244 = 7222838²).

The spelling of 1064681403556 in words is "one trillion, sixty-four billion, six hundred eighty-one million, four hundred three thousand, five hundred fifty-six".