3957282661264 has 15 divisors (see below), whose sum is σ = 7667250573243. Its totient is φ = 1978637352048.

The previous prime is 3957282661237. The next prime is 3957282661301. The reversal of 3957282661264 is 4621662827593.

It is a happy number.

The square root of 3957282661264 is 1989292.

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

It is a super-2 number, since 2×3957282661264² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7708507 + ... + 8205829.

Almost surely, 2^{3957282661264} is an apocalyptic number.

3957282661264 is the 1989292-nd square number.

It is an amenable number.

3957282661264 is a deficient number, since it is larger than the sum of its proper divisors (3709967911979).

3957282661264 is an frugal number, since it uses more digits than its factorization.

3957282661264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994654 (or 497325 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 61.

It can be divided in two parts, 39572 and 82661264, that added together give a square (82700836 = 9094²).

The spelling of 3957282661264 in words is "three trillion, nine hundred fifty-seven billion, two hundred eighty-two million, six hundred sixty-one thousand, two hundred sixty-four".