55973967778 has 8 divisors (see below), whose sum is σ = 84312253440. Its totient is φ = 27869883300.

The previous prime is 55973967773. The next prime is 55973967781. The reversal of 55973967778 is 87776937955.

55973967778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55973967778.

It is not an unprimeable number, because it can be changed into a prime (55973967773) 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, 58549698 + ... + 58550653.

It is an arithmetic number, because the mean of its divisors is an integer number (10539031680).

Almost surely, 2^55973967778 is an apocalyptic number.

55973967778 is a deficient number, since it is larger than the sum of its proper divisors (28338285662).

55973967778 is a wasteful number, since it uses less digits than its factorization.

55973967778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117100592.

The product of its digits is 700131600, while the sum is 73.

The spelling of 55973967778 in words is "fifty-five billion, nine hundred seventy-three million, nine hundred sixty-seven thousand, seven hundred seventy-eight".