55542774818 has 8 divisors (see below), whose sum is σ = 83922295212. Its totient is φ = 27568676416.

The previous prime is 55542774811. The next prime is 55542774829. The reversal of 55542774818 is 81847724555.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52195342369 + 3347432449 = 228463^2 + 57857^2 .

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

It is not an unprimeable number, because it can be changed into a prime (55542774811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101355155 + ... + 101355702.

Almost surely, 2^55542774818 is an apocalyptic number.

55542774818 is a deficient number, since it is larger than the sum of its proper divisors (28379520394).

55542774818 is a wasteful number, since it uses less digits than its factorization.

55542774818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202710996.

The product of its digits is 12544000, while the sum is 56.

The spelling of 55542774818 in words is "fifty-five billion, five hundred forty-two million, seven hundred seventy-four thousand, eight hundred eighteen".