55019178578 has 32 divisors (see below), whose sum is σ = 101602771200. Its totient is φ = 21759635520.

The previous prime is 55019178563. The next prime is 55019178581. The reversal of 55019178578 is 87587191055.

It is a super-2 number, since 2×55019178578² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 626948 + ... + 709296.

It is an arithmetic number, because the mean of its divisors is an integer number (3175086600).

Almost surely, 2^55019178578 is an apocalyptic number.

55019178578 is a deficient number, since it is larger than the sum of its proper divisors (46583592622).

55019178578 is a wasteful number, since it uses less digits than its factorization.

55019178578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86042.

The product of its (nonzero) digits is 3528000, while the sum is 56.

The spelling of 55019178578 in words is "fifty-five billion, nineteen million, one hundred seventy-eight thousand, five hundred seventy-eight".