678257573521231 has 24 divisors (see below), whose sum is σ = 769728379392000. Its totient is φ = 596586219781200.

The previous prime is 678257573521211. The next prime is 678257573521343. The reversal of 678257573521231 is 132125375752876.

It is not a de Polignac number, because 678257573521231 - 2¹⁵ = 678257573488463 is a prime.

It is a super-2 number, since 2×678257573521231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678257573521211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71370 + ... + 36830968.

It is an arithmetic number, because the mean of its divisors is an integer number (32072015808000).

Almost surely, 2^{678257573521231} is an apocalyptic number.

678257573521231 is a deficient number, since it is larger than the sum of its proper divisors (91470805870769).

678257573521231 is a wasteful number, since it uses less digits than its factorization.

678257573521231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36764571 (or 36764560 counting only the distinct ones).

The product of its digits is 148176000, while the sum is 64.

The spelling of 678257573521231 in words is "six hundred seventy-eight trillion, two hundred fifty-seven billion, five hundred seventy-three million, five hundred twenty-one thousand, two hundred thirty-one".