71399078965 has 16 divisors (see below), whose sum is σ = 87478457472. Its totient is φ = 55929766464.

The previous prime is 71399078951. The next prime is 71399078987. The reversal of 71399078965 is 56987099317.

It is a cyclic number.

It is not a de Polignac number, because 71399078965 - 2⁷ = 71399078837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71399078897 and 71399078906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 582174 + ... + 694063.

It is an arithmetic number, because the mean of its divisors is an integer number (5467403592).

Almost surely, 2^71399078965 is an apocalyptic number.

It is an amenable number.

71399078965 is a deficient number, since it is larger than the sum of its proper divisors (16079378507).

71399078965 is a wasteful number, since it uses less digits than its factorization.

71399078965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276476.

The product of its (nonzero) digits is 25719120, while the sum is 64.

The spelling of 71399078965 in words is "seventy-one billion, three hundred ninety-nine million, seventy-eight thousand, nine hundred sixty-five".