71906078399 has 2 divisors, whose sum is σ = 71906078400. Its totient is φ = 71906078398.

The previous prime is 71906078371. The next prime is 71906078449. The reversal of 71906078399 is 99387060917.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71906078399 is a prime.

It is a super-2 number, since 2×71906078399² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71906078329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35953039199 + 35953039200.

It is an arithmetic number, because the mean of its divisors is an integer number (35953039200).

Almost surely, 2^71906078399 is an apocalyptic number.

71906078399 is a deficient number, since it is larger than the sum of its proper divisors (1).

71906078399 is an equidigital number, since it uses as much as digits as its factorization.

71906078399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The spelling of 71906078399 in words is "seventy-one billion, nine hundred six million, seventy-eight thousand, three hundred ninety-nine".