81062353200 has 90 divisors (see below), whose sum is σ = 259701335764. Its totient is φ = 21613997440.

The previous prime is 81062353199. The next prime is 81062353201. The reversal of 81062353200 is 235326018.

It is an interprime number because it is at equal distance from previous prime (81062353199) and next prime (81062353201).

It is a super-2 number, since 2×81062353200² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (81062353201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9858691 + ... + 9866909.

Almost surely, 2^81062353200 is an apocalyptic number.

81062353200 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81062353200 is an abundant number, since it is smaller than the sum of its proper divisors (178638982564).

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

81062353200 is an frugal number, since it uses more digits than its factorization.

81062353200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16459 (or 8229 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 81062353200 its reverse (235326018), we get a palindrome (81297679218).

The spelling of 81062353200 in words is "eighty-one billion, sixty-two million, three hundred fifty-three thousand, two hundred".