81419290460 has 24 divisors (see below), whose sum is σ = 176876390880. Its totient is φ = 31444691264.

The previous prime is 81419290457. The next prime is 81419290483. The reversal of 81419290460 is 6409291418.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70188464 + ... + 70189623.

It is an arithmetic number, because the mean of its divisors is an integer number (7369849620).

Almost surely, 2^81419290460 is an apocalyptic number.

It is an amenable number.

81419290460 is an abundant number, since it is smaller than the sum of its proper divisors (95457100420).

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

81419290460 is a wasteful number, since it uses less digits than its factorization.

81419290460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140378125 (or 140378123 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 81419290460 in words is "eighty-one billion, four hundred nineteen million, two hundred ninety thousand, four hundred sixty".