55387091907 has 12 divisors (see below), whose sum is σ = 91432659760. Its totient is φ = 31649766768.

The previous prime is 55387091833. The next prime is 55387091917. The reversal of 55387091907 is 70919078355.

55387091907 is a `hidden beast` number, since 553 + 8 + 70 + 9 + 19 + 0 + 7 = 666.

It is not a de Polignac number, because 55387091907 - 2¹⁸ = 55386829763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55387091917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439580032 + ... + 439580157.

Almost surely, 2^55387091907 is an apocalyptic number.

55387091907 is a deficient number, since it is larger than the sum of its proper divisors (36045567853).

55387091907 is a wasteful number, since it uses less digits than its factorization.

55387091907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879160202 (or 879160199 counting only the distinct ones).

The product of its (nonzero) digits is 2381400, while the sum is 54.

The spelling of 55387091907 in words is "fifty-five billion, three hundred eighty-seven million, ninety-one thousand, nine hundred seven".