70819999999999 has 4 divisors (see below), whose sum is σ = 70820066017440. Its totient is φ = 70819933982560.

The previous prime is 70819999999979. The next prime is 70820000000063. The reversal of 70819999999999 is 99999999991807.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70819999999999 - 2¹⁹ = 70819999475711 is a prime.

It is a super-9 number, since 9×70819999999999⁹ (a number of 126 digits) contains 999999999 as substring.

It is a Duffinian number.

70819999999999 is a modest number, since divided by 9999999 gives 7081999 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70819999999979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31372567 + ... + 33554104.

It is an arithmetic number, because the mean of its divisors is an integer number (17705016504360).

Almost surely, 2^{70819999999999} is an apocalyptic number.

70819999999999 is a deficient number, since it is larger than the sum of its proper divisors (66017441).

70819999999999 is a wasteful number, since it uses less digits than its factorization.

70819999999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66017440.

The product of its (nonzero) digits is 195259926456, while the sum is 106.

The spelling of 70819999999999 in words is "seventy trillion, eight hundred nineteen billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".