71881520763 has 16 divisors (see below), whose sum is σ = 103227281696. Its totient is φ = 44229300480.

The previous prime is 71881520731. The next prime is 71881520819. The reversal of 71881520763 is 36702518817.

It is a happy number.

It is not a de Polignac number, because 71881520763 - 2⁵ = 71881520731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71881520363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216693 + ... + 436713.

It is an arithmetic number, because the mean of its divisors is an integer number (6451705106).

Almost surely, 2^71881520763 is an apocalyptic number.

71881520763 is a deficient number, since it is larger than the sum of its proper divisors (31345760933).

71881520763 is a wasteful number, since it uses less digits than its factorization.

71881520763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228414.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 71881520763 in words is "seventy-one billion, eight hundred eighty-one million, five hundred twenty thousand, seven hundred sixty-three".