78955255987 has 2 divisors, whose sum is σ = 78955255988. Its totient is φ = 78955255986.

The previous prime is 78955255979. The next prime is 78955255993.

78955255987 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 78955255987 - 2³ = 78955255979 is a prime.

It is not a weakly prime, because it can be changed into another prime (78955259987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39477627993 + 39477627994.

It is an arithmetic number, because the mean of its divisors is an integer number (39477627994).

Almost surely, 2^78955255987 is an apocalyptic number.

78955255987 is a deficient number, since it is larger than the sum of its proper divisors (1).

78955255987 is an equidigital number, since it uses as much as digits as its factorization.

78955255987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520000, while the sum is 70.

The spelling of 78955255987 in words is "seventy-eight billion, nine hundred fifty-five million, two hundred fifty-five thousand, nine hundred eighty-seven".