55387307385 has 64 divisors (see below), whose sum is σ = 107621775360. Its totient is φ = 26905374720.

The previous prime is 55387307251. The next prime is 55387307387. The reversal of 55387307385 is 58370378355.

55387307385 is a `hidden beast` number, since 5 + 538 + 7 + 30 + 73 + 8 + 5 = 666.

It is not a de Polignac number, because 55387307385 - 2⁹ = 55387306873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55387307387) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 318112 + ... + 460401.

It is an arithmetic number, because the mean of its divisors is an integer number (1681590240).

Almost surely, 2^55387307385 is an apocalyptic number.

It is an amenable number.

55387307385 is a deficient number, since it is larger than the sum of its proper divisors (52234467975).

55387307385 is a wasteful number, since it uses less digits than its factorization.

55387307385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778575 (or 778569 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 54.

It can be divided in two parts, 5538730 and 7385, that added together give a triangular number (5546115 = T₃₃₃₀).

The spelling of 55387307385 in words is "fifty-five billion, three hundred eighty-seven million, three hundred seven thousand, three hundred eighty-five".