81038071415 has 32 divisors (see below), whose sum is σ = 111523184640. Its totient is φ = 55376640000.

The previous prime is 81038071403. The next prime is 81038071421. The reversal of 81038071415 is 51417083018.

It is a happy number.

It is not a de Polignac number, because 81038071415 - 2¹⁰ = 81038070391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16877015 + ... + 16881815.

It is an arithmetic number, because the mean of its divisors is an integer number (3485099520).

Almost surely, 2^81038071415 is an apocalyptic number.

81038071415 is a deficient number, since it is larger than the sum of its proper divisors (30485113225).

81038071415 is a wasteful number, since it uses less digits than its factorization.

81038071415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 81038071415 in words is "eighty-one billion, thirty-eight million, seventy-one thousand, four hundred fifteen".