81411740038 has 4 divisors (see below), whose sum is σ = 122117610060. Its totient is φ = 40705870018.

The previous prime is 81411740023. The next prime is 81411740057. The reversal of 81411740038 is 83004711418.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 81411739979 and 81411740006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20352935008 + ... + 20352935011.

It is an arithmetic number, because the mean of its divisors is an integer number (30529402515).

Almost surely, 2^81411740038 is an apocalyptic number.

81411740038 is a deficient number, since it is larger than the sum of its proper divisors (40705870022).

81411740038 is a wasteful number, since it uses less digits than its factorization.

81411740038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40705870021.

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 81411740038 in words is "eighty-one billion, four hundred eleven million, seven hundred forty thousand, thirty-eight".