55693791 has 16 divisors (see below), whose sum is σ = 82790400. Its totient is φ = 37002744.

The previous prime is 55693789. The next prime is 55693829. The reversal of 55693791 is 19739655.

55693791 is a `hidden beast` number, since 556 + 9 + 3 + 7 + 91 = 666.

It is not a de Polignac number, because 55693791 - 2¹ = 55693789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55693711) 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, 4930 + ... + 11648.

It is an arithmetic number, because the mean of its divisors is an integer number (5174400).

Almost surely, 2^55693791 is an apocalyptic number.

55693791 is a deficient number, since it is larger than the sum of its proper divisors (27096609).

55693791 is a wasteful number, since it uses less digits than its factorization.

55693791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035 (or 7029 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 55693791 is about 7462.8272792555. The cubic root of 55693791 is about 381.8876322182.

The spelling of 55693791 in words is "fifty-five million, six hundred ninety-three thousand, seven hundred ninety-one".