531264165556 has 12 divisors (see below), whose sum is σ = 984401248068. Its totient is φ = 250006666112.

The previous prime is 531264165541. The next prime is 531264165577. The reversal of 531264165556 is 655561462135.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 393091380900 + 138172784656 = 626970^2 + 371716^2 .

It is a super-2 number, since 2×531264165556² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3906354091 + ... + 3906354226.

It is an arithmetic number, because the mean of its divisors is an integer number (82033437339).

Almost surely, 2^531264165556 is an apocalyptic number.

It is an amenable number.

531264165556 is a deficient number, since it is larger than the sum of its proper divisors (453137082512).

531264165556 is a wasteful number, since it uses less digits than its factorization.

531264165556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7812708338 (or 7812708336 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 49.

The spelling of 531264165556 in words is "five hundred thirty-one billion, two hundred sixty-four million, one hundred sixty-five thousand, five hundred fifty-six".