612995770640 has 160 divisors (see below), whose sum is σ = 1566825645312. Its totient is φ = 221184000000.

The previous prime is 612995770633. The next prime is 612995770649. The reversal of 612995770640 is 46077599216.

It is not an unprimeable number, because it can be changed into a prime (612995770649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153208640 + ... + 153212640.

Almost surely, 2^612995770640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612995770640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783412822656).

612995770640 is an abundant number, since it is smaller than the sum of its proper divisors (953829874672).

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

612995770640 is a wasteful number, since it uses less digits than its factorization.

612995770640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329 (or 5323 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 612995770640 in words is "six hundred twelve billion, nine hundred ninety-five million, seven hundred seventy thousand, six hundred forty".