81362167555 has 32 divisors (see below), whose sum is σ = 103740056640. Its totient is φ = 61086597120.

The previous prime is 81362167547. The next prime is 81362167559. The reversal of 81362167555 is 55576126318.

It is not a de Polignac number, because 81362167555 - 2³ = 81362167547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81362167499 and 81362167508.

It is not an unprimeable number, because it can be changed into a prime (81362167559) 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, 4409529 + ... + 4427941.

It is an arithmetic number, because the mean of its divisors is an integer number (3241876770).

Almost surely, 2^81362167555 is an apocalyptic number.

81362167555 is a deficient number, since it is larger than the sum of its proper divisors (22377889085).

81362167555 is a wasteful number, since it uses less digits than its factorization.

81362167555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18871.

The product of its digits is 1512000, while the sum is 49.

The spelling of 81362167555 in words is "eighty-one billion, three hundred sixty-two million, one hundred sixty-seven thousand, five hundred fifty-five".