678023588391 has 8 divisors (see below), whose sum is σ = 904036692864. Its totient is φ = 452013104760.

The previous prime is 678023588377. The next prime is 678023588443. The reversal of 678023588391 is 193885320876.

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

It is not a de Polignac number, because 678023588391 - 2¹⁸ = 678023326247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678023588311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59950 + ... + 1166036.

It is an arithmetic number, because the mean of its divisors is an integer number (113004586608).

Almost surely, 2^678023588391 is an apocalyptic number.

678023588391 is a deficient number, since it is larger than the sum of its proper divisors (226013104473).

678023588391 is a wasteful number, since it uses less digits than its factorization.

678023588391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310421.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 678023588391 in words is "six hundred seventy-eight billion, twenty-three million, five hundred eighty-eight thousand, three hundred ninety-one".