71886563997 has 32 divisors (see below), whose sum is σ = 97958515200. Its totient is φ = 46880285760.

The previous prime is 71886563993. The next prime is 71886564091. The reversal of 71886563997 is 79936568817.

It is not a de Polignac number, because 71886563997 - 2² = 71886563993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71886563993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42310254 + ... + 42311952.

It is an arithmetic number, because the mean of its divisors is an integer number (3061203600).

Almost surely, 2^71886563997 is an apocalyptic number.

It is an amenable number.

71886563997 is a deficient number, since it is larger than the sum of its proper divisors (26071951203).

71886563997 is a wasteful number, since it uses less digits than its factorization.

71886563997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113.

The product of its digits is 137168640, while the sum is 69.

The spelling of 71886563997 in words is "seventy-one billion, eight hundred eighty-six million, five hundred sixty-three thousand, nine hundred ninety-seven".