81127634 has 12 divisors (see below), whose sum is σ = 141559614. Its totient is φ = 34768944.

The previous prime is 81127609. The next prime is 81127637. The reversal of 81127634 is 43672118.

It can be written as a sum of positive squares in only one way, i.e., 46963609 + 34164025 = 6853^2 + 5845^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81127634.

It is not an unprimeable number, because it can be changed into a prime (81127637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413819 + ... + 414014.

Almost surely, 2^81127634 is an apocalyptic number.

81127634 is a deficient number, since it is larger than the sum of its proper divisors (60431980).

81127634 is a wasteful number, since it uses less digits than its factorization.

81127634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827849 (or 827842 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 81127634 is about 9007.0879866914. The cubic root of 81127634 is about 432.9020111903.

The spelling of 81127634 in words is "eighty-one million, one hundred twenty-seven thousand, six hundred thirty-four".