678545955 has 24 divisors (see below), whose sum is σ = 1238050320. Its totient is φ = 342843840.

The previous prime is 678545947. The next prime is 678545971. The reversal of 678545955 is 559545876.

678545955 is a `hidden beast` number, since 6 + 7 + 8 + 545 + 95 + 5 = 666.

It is not a de Polignac number, because 678545955 - 2³ = 678545947 is a prime.

It is a super-2 number, since 2×678545955² = 920849226093724050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 395956 + ... + 397665.

It is an arithmetic number, because the mean of its divisors is an integer number (51585430).

Almost surely, 2^678545955 is an apocalyptic number.

678545955 is a deficient number, since it is larger than the sum of its proper divisors (559504365).

678545955 is a wasteful number, since it uses less digits than its factorization.

678545955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793651 (or 793648 counting only the distinct ones).

The product of its digits is 7560000, while the sum is 54.

The square root of 678545955 is about 26048.9146606917. The cubic root of 678545955 is about 878.7387039928.

The spelling of 678545955 in words is "six hundred seventy-eight million, five hundred forty-five thousand, nine hundred fifty-five".