71135645536465 has 4 divisors (see below), whose sum is σ = 85362774643764. Its totient is φ = 56908516429168.

The previous prime is 71135645536343. The next prime is 71135645536481. The reversal of 71135645536465 is 56463554653117.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15611791782976 + 55523853753489 = 3951176^2 + 7451433^2 .

It is a cyclic number.

It is not a de Polignac number, because 71135645536465 - 2¹⁵ = 71135645503697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7113564553642 + ... + 7113564553651.

It is an arithmetic number, because the mean of its divisors is an integer number (21340693660941).

Almost surely, 2^{71135645536465} is an apocalyptic number.

It is an amenable number.

71135645536465 is a deficient number, since it is larger than the sum of its proper divisors (14227129107299).

71135645536465 is a wasteful number, since it uses less digits than its factorization.

71135645536465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14227129107298.

The product of its digits is 136080000, while the sum is 61.

The spelling of 71135645536465 in words is "seventy-one trillion, one hundred thirty-five billion, six hundred forty-five million, five hundred thirty-six thousand, four hundred sixty-five".