81437846070 has 64 divisors (see below), whose sum is σ = 224262452736. Its totient is φ = 18540192000.

The previous prime is 81437846059. The next prime is 81437846093. The reversal of 81437846070 is 7064873418.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 719799 + ... + 825218.

It is an arithmetic number, because the mean of its divisors is an integer number (3504100824).

Almost surely, 2^81437846070 is an apocalyptic number.

81437846070 is an abundant number, since it is smaller than the sum of its proper divisors (142824606666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81437846070 is a wasteful number, since it uses less digits than its factorization.

81437846070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545285.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 81437846070 in words is "eighty-one billion, four hundred thirty-seven million, eight hundred forty-six thousand, seventy".