678504103164551 has 16 divisors (see below), whose sum is σ = 721769928899040. Its totient is φ = 635612598512640.

The previous prime is 678504103164529. The next prime is 678504103164583. The reversal of 678504103164551 is 155461301405876.

It is a cyclic number.

It is not a de Polignac number, because 678504103164551 - 2⁶ = 678504103164487 is a prime.

It is a super-2 number, since 2×678504103164551² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678504103164521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13193966 + ... + 39129131.

It is an arithmetic number, because the mean of its divisors is an integer number (45110620556190).

Almost surely, 2^{678504103164551} is an apocalyptic number.

678504103164551 is a deficient number, since it is larger than the sum of its proper divisors (43265825734489).

678504103164551 is a wasteful number, since it uses less digits than its factorization.

678504103164551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52326674.

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 678504103164551 in words is "six hundred seventy-eight trillion, five hundred four billion, one hundred three million, one hundred sixty-four thousand, five hundred fifty-one".