678351786147 has 18 divisors (see below), whose sum is σ = 1139815586988. Its totient is φ = 387629591832.

The previous prime is 678351786127. The next prime is 678351786179. The reversal of 678351786147 is 741687153876.

678351786147 is a `hidden beast` number, since 6 + 7 + 8 + 3 + 5 + 1 + 7 + 8 + 614 + 7 = 666.

It is not a de Polignac number, because 678351786147 - 2¹⁵ = 678351753379 is a prime.

It is a super-2 number, since 2×678351786147² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (678351786127) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 769105893 + ... + 769106774.

It is an arithmetic number, because the mean of its divisors is an integer number (63323088166).

Almost surely, 2^678351786147 is an apocalyptic number.

678351786147 is a deficient number, since it is larger than the sum of its proper divisors (461463800841).

678351786147 is a wasteful number, since it uses less digits than its factorization.

678351786147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538212687 (or 1538212677 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The spelling of 678351786147 in words is "six hundred seventy-eight billion, three hundred fifty-one million, seven hundred eighty-six thousand, one hundred forty-seven".