55693278 has 16 divisors (see below), whose sum is σ = 123762960. Its totient is φ = 18564408.

The previous prime is 55693273. The next prime is 55693303. The reversal of 55693278 is 87239655.

It is a happy number.

55693278 is a `hidden beast` number, since 556 + 93 + 2 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55693271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515625 + ... + 515732.

It is an arithmetic number, because the mean of its divisors is an integer number (7735185).

Almost surely, 2^55693278 is an apocalyptic number.

55693278 is an abundant number, since it is smaller than the sum of its proper divisors (68069682).

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

55693278 is a wasteful number, since it uses less digits than its factorization.

55693278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031368 (or 1031362 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 55693278 is about 7462.7929088244. The cubic root of 55693278 is about 381.8864596820.

The spelling of 55693278 in words is "fifty-five million, six hundred ninety-three thousand, two hundred seventy-eight".