81149305150 has 12 divisors (see below), whose sum is σ = 150937707672. Its totient is φ = 32459722040.

The previous prime is 81149305117. The next prime is 81149305201. The reversal of 81149305150 is 5150394118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 811493002 + ... + 811493101.

It is an arithmetic number, because the mean of its divisors is an integer number (12578142306).

Almost surely, 2^81149305150 is an apocalyptic number.

81149305150 is a deficient number, since it is larger than the sum of its proper divisors (69788402522).

81149305150 is a wasteful number, since it uses less digits than its factorization.

81149305150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622986115 (or 1622986110 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 37.

Adding to 81149305150 its reverse (5150394118), we get a palindrome (86299699268).

The spelling of 81149305150 in words is "eighty-one billion, one hundred forty-nine million, three hundred five thousand, one hundred fifty".