81411700738 has 16 divisors (see below), whose sum is σ = 125705764800. Its totient is φ = 39521116656.

The previous prime is 81411700723. The next prime is 81411700787. The reversal of 81411700738 is 83700711418.

It is a self number, because there is not a number n which added to its sum of digits gives 81411700738.

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, 2819913 + ... + 2848636.

It is an arithmetic number, because the mean of its divisors is an integer number (7856610300).

Almost surely, 2^81411700738 is an apocalyptic number.

81411700738 is a deficient number, since it is larger than the sum of its proper divisors (44294064062).

81411700738 is a wasteful number, since it uses less digits than its factorization.

81411700738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5668761.

The product of its (nonzero) digits is 37632, while the sum is 40.

The spelling of 81411700738 in words is "eighty-one billion, four hundred eleven million, seven hundred thousand, seven hundred thirty-eight".