612659978 has 32 divisors (see below), whose sum is σ = 1107786240. Its totient is φ = 248246640.

The previous prime is 612659969. The next prime is 612659989. The reversal of 612659978 is 879956216.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147713 + ... + 151803.

It is an arithmetic number, because the mean of its divisors is an integer number (34618320).

Almost surely, 2^612659978 is an apocalyptic number.

612659978 is a deficient number, since it is larger than the sum of its proper divisors (495126262).

612659978 is a wasteful number, since it uses less digits than its factorization.

612659978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682.

The product of its digits is 1632960, while the sum is 53.

The square root of 612659978 is about 24751.9691741889. The cubic root of 612659978 is about 849.3235577835.

The spelling of 612659978 in words is "six hundred twelve million, six hundred fifty-nine thousand, nine hundred seventy-eight".