678323247538 has 16 divisors (see below), whose sum is σ = 1031259893760. Its totient is φ = 334577412000.

The previous prime is 678323247499. The next prime is 678323247541. The reversal of 678323247538 is 835742323876.

It is a happy number.

It is a super-2 number, since 2×678323247538² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683123 + ... + 2046838.

It is an arithmetic number, because the mean of its divisors is an integer number (64453743360).

Almost surely, 2^678323247538 is an apocalyptic number.

678323247538 is a deficient number, since it is larger than the sum of its proper divisors (352936646222).

678323247538 is a wasteful number, since it uses less digits than its factorization.

678323247538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731193.

The product of its digits is 40642560, while the sum is 58.

The spelling of 678323247538 in words is "six hundred seventy-eight billion, three hundred twenty-three million, two hundred forty-seven thousand, five hundred thirty-eight".