81044737034 has 4 divisors (see below), whose sum is σ = 121567105554. Its totient is φ = 40522368516.

The previous prime is 81044737001. The next prime is 81044737069. The reversal of 81044737034 is 43073744018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43073744018 = 2 ⋅21536872009.

It can be written as a sum of positive squares in only one way, i.e., 41230520809 + 39814216225 = 203053^2 + 199535^2 .

It is a super-2 number, since 2×81044737034² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81044736982 and 81044737000.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20261184257 + ... + 20261184260.

Almost surely, 2^81044737034 is an apocalyptic number.

81044737034 is a deficient number, since it is larger than the sum of its proper divisors (40522368520).

81044737034 is a wasteful number, since it uses less digits than its factorization.

81044737034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40522368519.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 81044737034 in words is "eighty-one billion, forty-four million, seven hundred thirty-seven thousand, thirty-four".