55845678979 has 2 divisors, whose sum is σ = 55845678980. Its totient is φ = 55845678978.

The previous prime is 55845678949. The next prime is 55845679007. The reversal of 55845678979 is 97987654855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55845678979 - 2³³ = 47255744387 is a prime.

It is not a weakly prime, because it can be changed into another prime (55845678949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27922839489 + 27922839490.

It is an arithmetic number, because the mean of its divisors is an integer number (27922839490).

Almost surely, 2^55845678979 is an apocalyptic number.

55845678979 is a deficient number, since it is larger than the sum of its proper divisors (1).

55845678979 is an equidigital number, since it uses as much as digits as its factorization.

55845678979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048000, while the sum is 73.

The spelling of 55845678979 in words is "fifty-five billion, eight hundred forty-five million, six hundred seventy-eight thousand, nine hundred seventy-nine".