81626050 has 24 divisors (see below), whose sum is σ = 165627792. Its totient is φ = 29682000.

The previous prime is 81626047. The next prime is 81626059. The reversal of 81626050 is 5062618.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (81626059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73656 + ... + 74755.

It is an arithmetic number, because the mean of its divisors is an integer number (6901158).

Almost surely, 2^81626050 is an apocalyptic number.

81626050 is an abundant number, since it is smaller than the sum of its proper divisors (84001742).

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

81626050 is a wasteful number, since it uses less digits than its factorization.

81626050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148434 (or 148429 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 81626050 is about 9034.7136091854. The cubic root of 81626050 is about 433.7867279483.

Adding to 81626050 its reverse (5062618), we get a palindrome (86688668).

The spelling of 81626050 in words is "eighty-one million, six hundred twenty-six thousand, fifty".