81419585198700 has 72 divisors (see below), whose sum is σ = 269227428397312. Its totient is φ = 18610190902080.

The previous prime is 81419585198683. The next prime is 81419585198719. The reversal of 81419585198700 is 789158591418.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19385613424 + ... + 19385617623.

Almost surely, 2^{81419585198700} is an apocalyptic number.

It is an amenable number.

81419585198700 is an abundant number, since it is smaller than the sum of its proper divisors (187807843198612).

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

81419585198700 is a wasteful number, since it uses less digits than its factorization.

81419585198700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38771231071 (or 38771231064 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 66.

The spelling of 81419585198700 in words is "eighty-one trillion, four hundred nineteen billion, five hundred eighty-five million, one hundred ninety-eight thousand, seven hundred".