55398278429 has 4 divisors (see below), whose sum is σ = 59659684476. Its totient is φ = 51136872384.

The previous prime is 55398278413. The next prime is 55398278477. The reversal of 55398278429 is 92487289355.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6414408100 + 48983870329 = 80090^2 + 221323^2 .

It is not a de Polignac number, because 55398278429 - 2⁴ = 55398278413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55398278479) 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, 2130703004 + ... + 2130703029.

It is an arithmetic number, because the mean of its divisors is an integer number (14914921119).

Almost surely, 2^55398278429 is an apocalyptic number.

It is an amenable number.

55398278429 is a deficient number, since it is larger than the sum of its proper divisors (4261406047).

55398278429 is a wasteful number, since it uses less digits than its factorization.

55398278429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261406046.

The product of its digits is 43545600, while the sum is 62.

The spelling of 55398278429 in words is "fifty-five billion, three hundred ninety-eight million, two hundred seventy-eight thousand, four hundred twenty-nine".