81626100160 has 56 divisors (see below), whose sum is σ = 212042355696. Its totient is φ = 29682216960.

The previous prime is 81626100133. The next prime is 81626100163. The reversal of 81626100160 is 6100162618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81626100163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11591097 + ... + 11598136.

Almost surely, 2^81626100160 is an apocalyptic number.

81626100160 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81626100160 is an abundant number, since it is smaller than the sum of its proper divisors (130416255536).

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

81626100160 is a wasteful number, since it uses less digits than its factorization.

81626100160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23189261 (or 23189251 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 81626100160 its reverse (6100162618), we get a palindrome (87726262778).

The spelling of 81626100160 in words is "eighty-one billion, six hundred twenty-six million, one hundred thousand, one hundred sixty".