55615545 has 16 divisors (see below), whose sum is σ = 98872320. Its totient is φ = 29661552.

The previous prime is 55615537. The next prime is 55615559. The reversal of 55615545 is 54551655.

55615545 is a `hidden beast` number, since 5 + 561 + 55 + 45 = 666.

It is not a de Polignac number, because 55615545 - 2³ = 55615537 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205849 + ... + 206118.

It is an arithmetic number, because the mean of its divisors is an integer number (6179520).

Almost surely, 2^55615545 is an apocalyptic number.

It is an amenable number.

55615545 is a deficient number, since it is larger than the sum of its proper divisors (43256775).

55615545 is a wasteful number, since it uses less digits than its factorization.

55615545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411981 (or 411975 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 55615545 is about 7457.5830535100. The cubic root of 55615545 is about 381.7087063227.

The spelling of 55615545 in words is "fifty-five million, six hundred fifteen thousand, five hundred forty-five".