55770009 has 8 divisors (see below), whose sum is σ = 77593152. Its totient is φ = 35563440.

The previous prime is 55770007. The next prime is 55770019. The reversal of 55770009 is 90007755.

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

It is not a de Polignac number, because 55770009 - 2¹ = 55770007 is a prime.

It is a super-2 number, since 2×55770009² = 6220587807720162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55770007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404062 + ... + 404199.

It is an arithmetic number, because the mean of its divisors is an integer number (9699144).

Almost surely, 2^55770009 is an apocalyptic number.

It is an amenable number.

55770009 is a deficient number, since it is larger than the sum of its proper divisors (21823143).

55770009 is a wasteful number, since it uses less digits than its factorization.

55770009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808287.

The product of its (nonzero) digits is 11025, while the sum is 33.

The square root of 55770009 is about 7467.9320430759. The cubic root of 55770009 is about 382.0617596115.

The spelling of 55770009 in words is "fifty-five million, seven hundred seventy thousand, nine".