81079885059 has 16 divisors (see below), whose sum is σ = 108602050560. Its totient is φ = 53805669120.

The previous prime is 81079885021. The next prime is 81079885063. The reversal of 81079885059 is 95058897018.

It is not a de Polignac number, because 81079885059 - 2¹⁵ = 81079852291 is a prime.

It is a super-2 number, since 2×81079885059² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81079884993 and 81079885011.

It is not an unprimeable number, because it can be changed into a prime (81079885069) 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, 1893939 + ... + 1936275.

It is an arithmetic number, because the mean of its divisors is an integer number (6787628160).

Almost surely, 2^81079885059 is an apocalyptic number.

81079885059 is a deficient number, since it is larger than the sum of its proper divisors (27522165501).

81079885059 is a wasteful number, since it uses less digits than its factorization.

81079885059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45250.

The product of its (nonzero) digits is 7257600, while the sum is 60.

The spelling of 81079885059 in words is "eighty-one billion, seventy-nine million, eight hundred eighty-five thousand, fifty-nine".