81153888462 has 24 divisors (see below), whose sum is σ = 176253091560. Its totient is φ = 26986732080.

The previous prime is 81153888461. The next prime is 81153888467. The reversal of 81153888462 is 26488835118.

It is a super-2 number, since 2×81153888462² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81153888399 and 81153888408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81153888461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5372589 + ... + 5387672.

It is an arithmetic number, because the mean of its divisors is an integer number (7343878815).

Almost surely, 2^81153888462 is an apocalyptic number.

81153888462 is an abundant number, since it is smaller than the sum of its proper divisors (95099203098).

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

81153888462 is a wasteful number, since it uses less digits than its factorization.

81153888462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10760688 (or 10760685 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 54.

The spelling of 81153888462 in words is "eighty-one billion, one hundred fifty-three million, eight hundred eighty-eight thousand, four hundred sixty-two".