648627637 has 4 divisors (see below), whose sum is σ = 741288736. Its totient is φ = 555966540.

The previous prime is 648627631. The next prime is 648627647. The reversal of 648627637 is 736726846.

648627637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 648627637 - 2¹¹ = 648625589 is a prime.

It is a super-2 number, since 2×648627637² = 841435622960407538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648627631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46330539 + ... + 46330552.

It is an arithmetic number, because the mean of its divisors is an integer number (185322184).

Almost surely, 2^648627637 is an apocalyptic number.

It is an amenable number.

648627637 is a deficient number, since it is larger than the sum of its proper divisors (92661099).

648627637 is an equidigital number, since it uses as much as digits as its factorization.

648627637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92661098.

The product of its digits is 2032128, while the sum is 49.

The square root of 648627637 is about 25468.1690939887. The cubic root of 648627637 is about 865.6290375845.

The spelling of 648627637 in words is "six hundred forty-eight million, six hundred twenty-seven thousand, six hundred thirty-seven".