55957421477 has 4 divisors (see below), whose sum is σ = 55958635980. Its totient is φ = 55956206976.

The previous prime is 55957421423. The next prime is 55957421549. The reversal of 55957421477 is 77412475955.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77412475955 = 5 ⋅15482495191.

It can be written as a sum of positive squares in 2 ways, for example, as 44890591876 + 11066829601 = 211874^2 + 105199^2 .

It is a cyclic number.

It is not a de Polignac number, because 55957421477 - 2⁶ = 55957421413 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 (55957421407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535298 + ... + 631235.

It is an arithmetic number, because the mean of its divisors is an integer number (13989658995).

Almost surely, 2^55957421477 is an apocalyptic number.

It is an amenable number.

55957421477 is a deficient number, since it is larger than the sum of its proper divisors (1214503).

55957421477 is a wasteful number, since it uses less digits than its factorization.

55957421477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214502.

The product of its digits is 12348000, while the sum is 56.

The spelling of 55957421477 in words is "fifty-five billion, nine hundred fifty-seven million, four hundred twenty-one thousand, four hundred seventy-seven".