81622478503587 has 16 divisors (see below), whose sum is σ = 124910917447680. Its totient is φ = 46441238532672.

The previous prime is 81622478503571. The next prime is 81622478503609. The reversal of 81622478503587 is 78530587422618.

It is not a de Polignac number, because 81622478503587 - 2⁴ = 81622478503571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81622478503187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8340734787 + ... + 8340744572.

It is an arithmetic number, because the mean of its divisors is an integer number (7806932340480).

Almost surely, 2^{81622478503587} is an apocalyptic number.

81622478503587 is a deficient number, since it is larger than the sum of its proper divisors (43288438944093).

81622478503587 is a wasteful number, since it uses less digits than its factorization.

81622478503587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681479602.

The product of its (nonzero) digits is 180633600, while the sum is 66.

The spelling of 81622478503587 in words is "eighty-one trillion, six hundred twenty-two billion, four hundred seventy-eight million, five hundred three thousand, five hundred eighty-seven".