81241471758 has 16 divisors (see below), whose sum is σ = 162535242960. Its totient is φ = 27071774016.

The previous prime is 81241471709. The next prime is 81241471763. The reversal of 81241471758 is 85717414218.

It is a super-2 number, since 2×81241471758² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2158935 + ... + 2196242.

It is an arithmetic number, because the mean of its divisors is an integer number (10158452685).

Almost surely, 2^81241471758 is an apocalyptic number.

81241471758 is an abundant number, since it is smaller than the sum of its proper divisors (81293771202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81241471758 is a wasteful number, since it uses less digits than its factorization.

81241471758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358291.

The product of its digits is 501760, while the sum is 48.

The spelling of 81241471758 in words is "eighty-one billion, two hundred forty-one million, four hundred seventy-one thousand, seven hundred fifty-eight".