646527227437 has 48 divisors (see below), whose sum is σ = 825312462912. Its totient is φ = 501887232000.

The previous prime is 646527227399. The next prime is 646527227471. The reversal of 646527227437 is 734722725646.

It is not a de Polignac number, because 646527227437 - 2¹⁵ = 646527194669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646527227497) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10682253 + ... + 10742605.

It is an arithmetic number, because the mean of its divisors is an integer number (17194009644).

Almost surely, 2^646527227437 is an apocalyptic number.

646527227437 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

646527227437 is a deficient number, since it is larger than the sum of its proper divisors (178785235475).

646527227437 is a wasteful number, since it uses less digits than its factorization.

646527227437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60698 (or 60691 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 55.

The spelling of 646527227437 in words is "six hundred forty-six billion, five hundred twenty-seven million, two hundred twenty-seven thousand, four hundred thirty-seven".