612647303640 has 128 divisors (see below), whose sum is σ = 1865106432000. Its totient is φ = 160966660608.

The previous prime is 612647303633. The next prime is 612647303753. The reversal of 612647303640 is 46303746216.

It is a junction number, because it is equal to n+sod(n) for n = 612647303592 and 612647303601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4473462 + ... + 4608378.

It is an arithmetic number, because the mean of its divisors is an integer number (14571144000).

Almost surely, 2^612647303640 is an apocalyptic number.

612647303640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612647303640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932553216000).

612647303640 is an abundant number, since it is smaller than the sum of its proper divisors (1252459128360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612647303640 is a wasteful number, since it uses less digits than its factorization.

612647303640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135489 (or 135485 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 612647303640 in words is "six hundred twelve billion, six hundred forty-seven million, three hundred three thousand, six hundred forty".