55555545 has 8 divisors (see below), whose sum is σ = 88888896. Its totient is φ = 29629616.

The previous prime is 55555543. The next prime is 55555547. The reversal of 55555545 is 54555555.

It is an interprime number because it is at equal distance from previous prime (55555543) and next prime (55555547).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55555545 - 2¹ = 55555543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55555543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851837 + ... + 1851866.

It is an arithmetic number, because the mean of its divisors is an integer number (11111112).

Almost surely, 2^55555545 is an apocalyptic number.

It is an amenable number.

55555545 is a deficient number, since it is larger than the sum of its proper divisors (33333351).

55555545 is a wasteful number, since it uses less digits than its factorization.

55555545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703711.

The product of its digits is 312500, while the sum is 39.

The square root of 55555545 is about 7453.5592169111. The cubic root of 55555545 is about 381.5713900183.

The spelling of 55555545 in words is "fifty-five million, five hundred fifty-five thousand, five hundred forty-five".