81411114744 has 64 divisors (see below), whose sum is σ = 227138342400. Its totient is φ = 27017475552.

The previous prime is 81411114739. The next prime is 81411114761. The reversal of 81411114744 is 44741111418.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 81411114699 and 81411114708.

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, 781152 + ... + 879215.

It is an arithmetic number, because the mean of its divisors is an integer number (3549036600).

Almost surely, 2^81411114744 is an apocalyptic number.

It is an amenable number.

81411114744 is an abundant number, since it is smaller than the sum of its proper divisors (145727227656).

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

81411114744 is a wasteful number, since it uses less digits than its factorization.

81411114744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660609 (or 1660599 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The spelling of 81411114744 in words is "eighty-one billion, four hundred eleven million, one hundred fourteen thousand, seven hundred forty-four".