55640767 has 16 divisors (see below), whose sum is σ = 68765760. Its totient is φ = 43840512.

The previous prime is 55640747. The next prime is 55640771. The reversal of 55640767 is 76704655.

It is a happy number.

55640767 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55640767 - 2¹¹ = 55638719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640707) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23343 + ... + 25615.

It is an arithmetic number, because the mean of its divisors is an integer number (4297860).

Almost surely, 2^55640767 is an apocalyptic number.

55640767 is a deficient number, since it is larger than the sum of its proper divisors (13124993).

55640767 is a wasteful number, since it uses less digits than its factorization.

55640767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 55640767 is about 7459.2738922766. The cubic root of 55640767 is about 381.7664000364.

The spelling of 55640767 in words is "fifty-five million, six hundred forty thousand, seven hundred sixty-seven".