81464595675810 has 64 divisors (see below), whose sum is σ = 195692378112000. Its totient is φ = 21704192782272.

The previous prime is 81464595675769. The next prime is 81464595675811. The reversal of 81464595675810 is 1857659546418.

It is a super-2 number, since 2×81464595675810² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81464595675811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221375787 + ... + 221743473.

It is an arithmetic number, because the mean of its divisors is an integer number (3057693408000).

Almost surely, 2^{81464595675810} is an apocalyptic number.

81464595675810 is an abundant number, since it is smaller than the sum of its proper divisors (114227782436190).

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

81464595675810 is a wasteful number, since it uses less digits than its factorization.

81464595675810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374375.

The product of its (nonzero) digits is 290304000, while the sum is 69.

The spelling of 81464595675810 in words is "eighty-one trillion, four hundred sixty-four billion, five hundred ninety-five million, six hundred seventy-five thousand, eight hundred ten".