55000000019 has 16 divisors (see below), whose sum is σ = 58666552320. Its totient is φ = 51469382880.

The previous prime is 55000000001. The next prime is 55000000021. The reversal of 55000000019 is 91000000055.

It is a cyclic number.

It is not a de Polignac number, because 55000000019 - 2¹² = 54999995923 is a prime.

It is a super-2 number, since 2×55000000019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55000000039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39872 + ... + 334050.

It is an arithmetic number, because the mean of its divisors is an integer number (3666659520).

Almost surely, 2^55000000019 is an apocalyptic number.

55000000019 is a deficient number, since it is larger than the sum of its proper divisors (3666552301).

55000000019 is a wasteful number, since it uses less digits than its factorization.

55000000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294410.

The product of its (nonzero) digits is 225, while the sum is 20.

The spelling of 55000000019 in words is "fifty-five billion, nineteen", and thus it is an aban number and an uban number.