612906678 has 48 divisors (see below), whose sum is σ = 1409419440. Its totient is φ = 191827968.

The previous prime is 612906643. The next prime is 612906709. The reversal of 612906678 is 876609216.

It is a super-3 number, since 3×612906678³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140758 + ... + 145046.

It is an arithmetic number, because the mean of its divisors is an integer number (29362905).

Almost surely, 2^612906678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612906678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704709720).

612906678 is an abundant number, since it is smaller than the sum of its proper divisors (796512762).

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

612906678 is a wasteful number, since it uses less digits than its factorization.

612906678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781 (or 4778 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 612906678 is about 24756.9521145071. The cubic root of 612906678 is about 849.4375416200.

The spelling of 612906678 in words is "six hundred twelve million, nine hundred six thousand, six hundred seventy-eight".