678936901549 has 16 divisors (see below), whose sum is σ = 731126347200. Its totient is φ = 628110793984.

The previous prime is 678936901547. The next prime is 678936901633. The reversal of 678936901549 is 945109639876.

It is a cyclic number.

It is not a de Polignac number, because 678936901549 - 2¹ = 678936901547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678936901547) 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, 13894242 + ... + 13943020.

It is an arithmetic number, because the mean of its divisors is an integer number (45695396700).

Almost surely, 2^678936901549 is an apocalyptic number.

It is an amenable number.

678936901549 is a deficient number, since it is larger than the sum of its proper divisors (52189445651).

678936901549 is a wasteful number, since it uses less digits than its factorization.

678936901549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62732.

The product of its (nonzero) digits is 88179840, while the sum is 67.

The spelling of 678936901549 in words is "six hundred seventy-eight billion, nine hundred thirty-six million, nine hundred one thousand, five hundred forty-nine".