678047641695 has 12 divisors (see below), whose sum is σ = 1175282579016. Its totient is φ = 361625408880.

The previous prime is 678047641651. The next prime is 678047641717. The reversal of 678047641695 is 596146740876.

It is a happy number.

678047641695 is a `hidden beast` number, since 6 + 78 + 0 + 476 + 4 + 1 + 6 + 95 = 666.

It is not a de Polignac number, because 678047641695 - 2²² = 678043447391 is a prime.

It is a super-2 number, since 2×678047641695² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7533862641 + ... + 7533862730.

It is an arithmetic number, because the mean of its divisors is an integer number (97940214918).

Almost surely, 2^678047641695 is an apocalyptic number.

678047641695 is a deficient number, since it is larger than the sum of its proper divisors (497234937321).

678047641695 is a wasteful number, since it uses less digits than its factorization.

678047641695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15067725382 (or 15067725379 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 678047641695 in words is "six hundred seventy-eight billion, forty-seven million, six hundred forty-one thousand, six hundred ninety-five".