55355957378 has 54 divisors (see below), whose sum is σ = 87847252731. Its totient is φ = 26160878016.

The previous prime is 55355957357. The next prime is 55355957389. The reversal of 55355957378 is 87375955355.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 43152999289 + 12202958089 = 207733^2 + 110467^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=166367.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55355957378.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 758300750 + ... + 758300822.

Almost surely, 2^55355957378 is an apocalyptic number.

55355957378 is a deficient number, since it is larger than the sum of its proper divisors (32491295353).

55355957378 is an frugal number, since it uses more digits than its factorization.

55355957378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 171 counting only the distinct ones).

The product of its digits is 99225000, while the sum is 62.

The spelling of 55355957378 in words is "fifty-five billion, three hundred fifty-five million, nine hundred fifty-seven thousand, three hundred seventy-eight".