71078826691 has 2 divisors, whose sum is σ = 71078826692. Its totient is φ = 71078826690.

The previous prime is 71078826683. The next prime is 71078826751. The reversal of 71078826691 is 19662887017.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71078826691 - 2³ = 71078826683 is a prime.

It is not a weakly prime, because it can be changed into another prime (71078829691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35539413345 + 35539413346.

It is an arithmetic number, because the mean of its divisors is an integer number (35539413346).

Almost surely, 2^71078826691 is an apocalyptic number.

71078826691 is a deficient number, since it is larger than the sum of its proper divisors (1).

71078826691 is an equidigital number, since it uses as much as digits as its factorization.

71078826691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 71078826691 in words is "seventy-one billion, seventy-eight million, eight hundred twenty-six thousand, six hundred ninety-one".