654925878 has 16 divisors (see below), whose sum is σ = 1455390960. Its totient is φ = 218308608.

The previous prime is 654925853. The next prime is 654925889. The reversal of 654925878 is 878529456.

654925878 is a `hidden beast` number, since 6 + 54 + 9 + 2 + 587 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 12128257 = 654925878 / (6 + 5 + 4 + 9 + 2 + 5 + 8 + 7 + 8).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6064075 + ... + 6064182.

It is an arithmetic number, because the mean of its divisors is an integer number (90961935).

Almost surely, 2^654925878 is an apocalyptic number.

654925878 is an abundant number, since it is smaller than the sum of its proper divisors (800465082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

654925878 is a wasteful number, since it uses less digits than its factorization.

654925878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12128268 (or 12128262 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 654925878 is about 25591.5196500716. The cubic root of 654925878 is about 868.4217999576.

The spelling of 654925878 in words is "six hundred fifty-four million, nine hundred twenty-five thousand, eight hundred seventy-eight".