55445765 has 4 divisors (see below), whose sum is σ = 66534924. Its totient is φ = 44356608.

The previous prime is 55445737. The next prime is 55445771. The reversal of 55445765 is 56754455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21967969 + 33477796 = 4687^2 + 5786^2 .

It is a cyclic number.

It is not a de Polignac number, because 55445765 - 2¹⁸ = 55183621 is a prime.

It is a Duffinian number.

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, 5544572 + ... + 5544581.

It is an arithmetic number, because the mean of its divisors is an integer number (16633731).

Almost surely, 2^55445765 is an apocalyptic number.

It is an amenable number.

55445765 is a deficient number, since it is larger than the sum of its proper divisors (11089159).

55445765 is a wasteful number, since it uses less digits than its factorization.

55445765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11089158.

The product of its digits is 420000, while the sum is 41.

The square root of 55445765 is about 7446.1913083133. The cubic root of 55445765 is about 381.3198907970.

The spelling of 55445765 in words is "fifty-five million, four hundred forty-five thousand, seven hundred sixty-five".