531623321650 has 12 divisors (see below), whose sum is σ = 988819378362. Its totient is φ = 212649328640.

The previous prime is 531623321627. The next prime is 531623321753. The reversal of 531623321650 is 56123326135.

It can be written as a sum of positive squares in 3 ways, for example, as 410116002409 + 121507319241 = 640403^2 + 348579^2 .

It is a super-2 number, since 2×531623321650² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5316233167 + ... + 5316233266.

Almost surely, 2^531623321650 is an apocalyptic number.

531623321650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

531623321650 is a deficient number, since it is larger than the sum of its proper divisors (457196056712).

531623321650 is a wasteful number, since it uses less digits than its factorization.

531623321650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632466445 (or 10632466440 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 531623321650 its reverse (56123326135), we get a palindrome (587746647785).

The spelling of 531623321650 in words is "five hundred thirty-one billion, six hundred twenty-three million, three hundred twenty-one thousand, six hundred fifty".