55554999979 has 2 divisors, whose sum is σ = 55554999980. Its totient is φ = 55554999978.

The previous prime is 55554999977. The next prime is 55555000021. The reversal of 55554999979 is 97999945555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55554999979 - 2¹ = 55554999977 is a prime.

It is a super-3 number, since 3×55554999979³ (a number of 33 digits) contains 333 as substring.

Together with 55554999977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55554999977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777499989 + 27777499990.

It is an arithmetic number, because the mean of its divisors is an integer number (27777499990).

Almost surely, 2^55554999979 is an apocalyptic number.

55554999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

55554999979 is an equidigital number, since it uses as much as digits as its factorization.

55554999979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1033357500, while the sum is 76.

The spelling of 55554999979 in words is "fifty-five billion, five hundred fifty-four million, nine hundred ninety-nine thousand, nine hundred seventy-nine".