55691764 has 12 divisors (see below), whose sum is σ = 99299844. Its totient is φ = 27320384.

The previous prime is 55691759. The next prime is 55691789. The reversal of 55691764 is 46719655.

It can be written as a sum of positive squares in 2 ways, for example, as 30891364 + 24800400 = 5558^2 + 4980^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55691764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131137 + ... + 131560.

It is an arithmetic number, because the mean of its divisors is an integer number (8274987).

Almost surely, 2^55691764 is an apocalyptic number.

It is an amenable number.

55691764 is a deficient number, since it is larger than the sum of its proper divisors (43608080).

55691764 is a wasteful number, since it uses less digits than its factorization.

55691764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262754 (or 262752 counting only the distinct ones).

The product of its digits is 226800, while the sum is 43.

The square root of 55691764 is about 7462.6914715805. The cubic root of 55691764 is about 381.8829991726.

The spelling of 55691764 in words is "fifty-five million, six hundred ninety-one thousand, seven hundred sixty-four".