612753640 has 16 divisors (see below), whose sum is σ = 1378695780. Its totient is φ = 245101440.

The previous prime is 612753619. The next prime is 612753641. The reversal of 612753640 is 46357216.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 611968644 + 784996 = 24738^2 + 886^2 .

It is a junction number, because it is equal to n+sod(n) for n = 612753596 and 612753605.

It is not an unprimeable number, because it can be changed into a prime (612753641) 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, 7659381 + ... + 7659460.

Almost surely, 2^612753640 is an apocalyptic number.

It is an amenable number.

612753640 is an abundant number, since it is smaller than the sum of its proper divisors (765942140).

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

612753640 is a wasteful number, since it uses less digits than its factorization.

612753640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15318852 (or 15318848 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 612753640 is about 24753.8611129658. The cubic root of 612753640 is about 849.3668364331.

The spelling of 612753640 in words is "six hundred twelve million, seven hundred fifty-three thousand, six hundred forty".