81102449016 has 32 divisors (see below), whose sum is σ = 225284581200. Its totient is φ = 27034149600.

The previous prime is 81102449003. The next prime is 81102449059. The reversal of 81102449016 is 61094420118.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187736935 + ... + 187737366.

Almost surely, 2^81102449016 is an apocalyptic number.

It is an amenable number.

81102449016 is an abundant number, since it is smaller than the sum of its proper divisors (144182132184).

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

81102449016 is a wasteful number, since it uses less digits than its factorization.

81102449016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375474316 (or 375474306 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 81102449016 in words is "eighty-one billion, one hundred two million, four hundred forty-nine thousand, sixteen".