71811483877 has 16 divisors (see below), whose sum is σ = 87182339200. Its totient is φ = 57778090560.

The previous prime is 71811483847. The next prime is 71811483881. The reversal of 71811483877 is 77838411817.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71811483877 is a prime.

It is a super-2 number, since 2×71811483877² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71811483847) 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, 2462274 + ... + 2491267.

It is an arithmetic number, because the mean of its divisors is an integer number (5448896200).

Almost surely, 2^71811483877 is an apocalyptic number.

It is an amenable number.

71811483877 is a deficient number, since it is larger than the sum of its proper divisors (15370855323).

71811483877 is a wasteful number, since it uses less digits than its factorization.

71811483877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953676.

The product of its digits is 2107392, while the sum is 55.

The spelling of 71811483877 in words is "seventy-one billion, eight hundred eleven million, four hundred eighty-three thousand, eight hundred seventy-seven".