55057469785 has 4 divisors (see below), whose sum is σ = 66068963748. Its totient is φ = 44045975824.

The previous prime is 55057469767. The next prime is 55057469801. The reversal of 55057469785 is 58796475055.

55057469785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8103780441 + 46953689344 = 90021^2 + 216688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55057469785 is a prime.

It is a Duffinian 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, 5505746974 + ... + 5505746983.

It is an arithmetic number, because the mean of its divisors is an integer number (16517240937).

Almost surely, 2^55057469785 is an apocalyptic number.

It is an amenable number.

55057469785 is a deficient number, since it is larger than the sum of its proper divisors (11011493963).

55057469785 is a wasteful number, since it uses less digits than its factorization.

55057469785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11011493962.

The product of its (nonzero) digits is 52920000, while the sum is 61.

The spelling of 55057469785 in words is "fifty-five billion, fifty-seven million, four hundred sixty-nine thousand, seven hundred eighty-five".