68841555187 has 2 divisors, whose sum is σ = 68841555188. Its totient is φ = 68841555186.

The previous prime is 68841555173. The next prime is 68841555271. The reversal of 68841555187 is 78155514886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68841555187 - 2⁷ = 68841555059 is a prime.

It is not a weakly prime, because it can be changed into another prime (68841535187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34420777593 + 34420777594.

It is an arithmetic number, because the mean of its divisors is an integer number (34420777594).

Almost surely, 2^68841555187 is an apocalyptic number.

68841555187 is a deficient number, since it is larger than the sum of its proper divisors (1).

68841555187 is an equidigital number, since it uses as much as digits as its factorization.

68841555187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752000, while the sum is 58.

The spelling of 68841555187 in words is "sixty-eight billion, eight hundred forty-one million, five hundred fifty-five thousand, one hundred eighty-seven".