55557457679 has 4 divisors (see below), whose sum is σ = 56096850576. Its totient is φ = 55018064784.

The previous prime is 55557457619. The next prime is 55557457691. The reversal of 55557457679 is 97675475555.

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

It is a cyclic number.

It is not a de Polignac number, because 55557457679 - 2²⁸ = 55289022223 is a prime.

It is a super-2 number, since 2×55557457679² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55557457619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269696294 + ... + 269696499.

It is an arithmetic number, because the mean of its divisors is an integer number (14024212644).

Almost surely, 2^55557457679 is an apocalyptic number.

55557457679 is a deficient number, since it is larger than the sum of its proper divisors (539392897).

55557457679 is a wasteful number, since it uses less digits than its factorization.

55557457679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539392896.

The product of its digits is 231525000, while the sum is 65.

The spelling of 55557457679 in words is "fifty-five billion, five hundred fifty-seven million, four hundred fifty-seven thousand, six hundred seventy-nine".