612768816 has 120 divisors (see below), whose sum is σ = 1931304960. Its totient is φ = 179683200.

The previous prime is 612768809. The next prime is 612768823. The reversal of 612768816 is 618867216.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (612768809) and next prime (612768823).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42865 + ... + 55343.

It is an arithmetic number, because the mean of its divisors is an integer number (16094208).

Almost surely, 2^612768816 is an apocalyptic number.

612768816 is a gapful number since it is divisible by the number (66) 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 612768816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965652480).

612768816 is an abundant number, since it is smaller than the sum of its proper divisors (1318536144).

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

612768816 is a wasteful number, since it uses less digits than its factorization.

612768816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12535 (or 12526 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 612768816 is about 24754.1676491051. The cubic root of 612768816 is about 849.3738484326.

The spelling of 612768816 in words is "six hundred twelve million, seven hundred sixty-eight thousand, eight hundred sixteen".