70819999999979 has 2 divisors, whose sum is σ = 70819999999980. Its totient is φ = 70819999999978.

The previous prime is 70819999999921. The next prime is 70820000000063. The reversal of 70819999999979 is 97999999991807.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70819999999979 is a prime.

It is not a weakly prime, because it can be changed into another prime (70819999992979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35409999999989 + 35409999999990.

It is an arithmetic number, because the mean of its divisors is an integer number (35409999999990).

Almost surely, 2^{70819999999979} is an apocalyptic number.

70819999999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

70819999999979 is an equidigital number, since it uses as much as digits as its factorization.

70819999999979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151868831688, while the sum is 104.

The spelling of 70819999999979 in words is "seventy trillion, eight hundred nineteen billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-nine".