678120161551 has 8 divisors (see below), whose sum is σ = 799994292224. Its totient is φ = 562495986360.

The previous prime is 678120161531. The next prime is 678120161557. The reversal of 678120161551 is 155161021876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 678120161551 - 2⁹ = 678120161039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678120161498 and 678120161507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678120161557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562488635 + ... + 1562489068.

It is an arithmetic number, because the mean of its divisors is an integer number (99999286528).

Almost surely, 2^678120161551 is an apocalyptic number.

678120161551 is a deficient number, since it is larger than the sum of its proper divisors (121874130673).

678120161551 is a wasteful number, since it uses less digits than its factorization.

678120161551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124977741.

The product of its (nonzero) digits is 100800, while the sum is 43.

The spelling of 678120161551 in words is "six hundred seventy-eight billion, one hundred twenty million, one hundred sixty-one thousand, five hundred fifty-one".