71212074665 has 16 divisors (see below), whose sum is σ = 85605638400. Its totient is φ = 56868991872.

The previous prime is 71212074623. The next prime is 71212074671. The reversal of 71212074665 is 56647021217.

It is a cyclic number.

It is not a de Polignac number, because 71212074665 - 2¹⁸ = 71211812521 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7232816 + ... + 7242654.

It is an arithmetic number, because the mean of its divisors is an integer number (5350352400).

Almost surely, 2^71212074665 is an apocalyptic number.

It is an amenable number.

71212074665 is a deficient number, since it is larger than the sum of its proper divisors (14393563735).

71212074665 is a wasteful number, since it uses less digits than its factorization.

71212074665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12256.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 71212074665 in words is "seventy-one billion, two hundred twelve million, seventy-four thousand, six hundred sixty-five".