81045468615 has 16 divisors (see below), whose sum is σ = 131009584608. Its totient is φ = 42778638336.

The previous prime is 81045468589. The next prime is 81045468629. The reversal of 81045468615 is 51686454018.

It is not a de Polignac number, because 81045468615 - 2¹⁶ = 81045403079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27849222 + ... + 27852131.

It is an arithmetic number, because the mean of its divisors is an integer number (8188099038).

Almost surely, 2^81045468615 is an apocalyptic number.

81045468615 is a deficient number, since it is larger than the sum of its proper divisors (49964115993).

81045468615 is a wasteful number, since it uses less digits than its factorization.

81045468615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55701458.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 81045468615 in words is "eighty-one billion, forty-five million, four hundred sixty-eight thousand, six hundred fifteen".