55420693057 has 4 divisors (see below), whose sum is σ = 55421327700. Its totient is φ = 55420058416.

The previous prime is 55420692973. The next prime is 55420693091. The reversal of 55420693057 is 75039602455.

It is a Cunningham number, because it is equal to 235416²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20541768976 + 34878924081 = 143324^2 + 186759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55420693057 is a prime.

It is a pancake number, because a pancake can be divided into 55420693057 parts by 332928 straight cuts.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55420692998 and 55420693016.

It is not an unprimeable number, because it can be changed into a prime (55420691057) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 160498 + ... + 369595.

It is an arithmetic number, because the mean of its divisors is an integer number (13855331925).

Almost surely, 2^55420693057 is an apocalyptic number.

It is an amenable number.

55420693057 is a deficient number, since it is larger than the sum of its proper divisors (634643).

55420693057 is a wasteful number, since it uses less digits than its factorization.

55420693057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634642.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 55420693057 in words is "fifty-five billion, four hundred twenty million, six hundred ninety-three thousand, fifty-seven".