71372477765 has 16 divisors (see below), whose sum is σ = 90718823232. Its totient is φ = 53719252224.

The previous prime is 71372477749. The next prime is 71372477791. The reversal of 71372477765 is 56777427317.

It is a cyclic number.

It is not a de Polignac number, because 71372477765 - 2⁴ = 71372477749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71372477765.

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, 75002 + ... + 385188.

It is an arithmetic number, because the mean of its divisors is an integer number (5669926452).

Almost surely, 2^71372477765 is an apocalyptic number.

It is an amenable number.

71372477765 is a deficient number, since it is larger than the sum of its proper divisors (19346345467).

71372477765 is a wasteful number, since it uses less digits than its factorization.

71372477765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312916.

The product of its digits is 12101040, while the sum is 56.

The spelling of 71372477765 in words is "seventy-one billion, three hundred seventy-two million, four hundred seventy-seven thousand, seven hundred sixty-five".