55808078351 has 4 divisors (see below), whose sum is σ = 55878101832. Its totient is φ = 55738054872.

The previous prime is 55808078303. The next prime is 55808078353. The reversal of 55808078351 is 15387080855.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55808078351 is a prime.

It is a super-2 number, since 2×55808078351² (a number of 22 digits) contains 22 as substring.

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 55808078351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55808078353) 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, 35010545 + ... + 35012138.

It is an arithmetic number, because the mean of its divisors is an integer number (13969525458).

Almost surely, 2^55808078351 is an apocalyptic number.

55808078351 is a deficient number, since it is larger than the sum of its proper divisors (70023481).

55808078351 is an equidigital number, since it uses as much as digits as its factorization.

55808078351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70023480.

The product of its (nonzero) digits is 1344000, while the sum is 50.

The spelling of 55808078351 in words is "fifty-five billion, eight hundred eight million, seventy-eight thousand, three hundred fifty-one".