81407179183462 has 96 divisors (see below), whose sum is σ = 140354229254400. Its totient is φ = 35319276569280.

The previous prime is 81407179183457. The next prime is 81407179183471. The reversal of 81407179183462 is 26438197170418.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 81407179183462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8534137089 + ... + 8534146627.

It is an arithmetic number, because the mean of its divisors is an integer number (1462023221400).

Almost surely, 2^{81407179183462} is an apocalyptic number.

81407179183462 is a deficient number, since it is larger than the sum of its proper divisors (58947050070938).

81407179183462 is a wasteful number, since it uses less digits than its factorization.

81407179183462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12682 (or 12671 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 61.

The spelling of 81407179183462 in words is "eighty-one trillion, four hundred seven billion, one hundred seventy-nine million, one hundred eighty-three thousand, four hundred sixty-two".