78898425971 has 2 divisors, whose sum is σ = 78898425972. Its totient is φ = 78898425970.

The previous prime is 78898425941. The next prime is 78898425997. The reversal of 78898425971 is 17952489887.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78898425971 is a prime.

It is not a weakly prime, because it can be changed into another prime (78898425901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39449212985 + 39449212986.

It is an arithmetic number, because the mean of its divisors is an integer number (39449212986).

Almost surely, 2^78898425971 is an apocalyptic number.

78898425971 is a deficient number, since it is larger than the sum of its proper divisors (1).

78898425971 is an equidigital number, since it uses as much as digits as its factorization.

78898425971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 68.

The spelling of 78898425971 in words is "seventy-eight billion, eight hundred ninety-eight million, four hundred twenty-five thousand, nine hundred seventy-one".