81215094038 has 16 divisors (see below), whose sum is σ = 131200694016. Its totient is φ = 37481866560.

The previous prime is 81215094029. The next prime is 81215094113. The reversal of 81215094038 is 83049051218.

It is a junction number, because it is equal to n+sod(n) for n = 81215093986 and 81215094004.

It is a congruent number.

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, 477323 + ... + 624713.

It is an arithmetic number, because the mean of its divisors is an integer number (8200043376).

Almost surely, 2^81215094038 is an apocalyptic number.

81215094038 is a deficient number, since it is larger than the sum of its proper divisors (49985599978).

81215094038 is a wasteful number, since it uses less digits than its factorization.

81215094038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168599.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 81215094038 in words is "eighty-one billion, two hundred fifteen million, ninety-four thousand, thirty-eight".