81019253714 has 32 divisors (see below), whose sum is σ = 140216935680. Its totient is φ = 34392241728.

The previous prime is 81019253669. The next prime is 81019253747. The reversal of 81019253714 is 41735291018.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 638627 + ... + 754905.

It is an arithmetic number, because the mean of its divisors is an integer number (4381779240).

Almost surely, 2^81019253714 is an apocalyptic number.

81019253714 is a deficient number, since it is larger than the sum of its proper divisors (59197681966).

81019253714 is a wasteful number, since it uses less digits than its factorization.

81019253714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116762.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 81019253714 in words is "eighty-one billion, nineteen million, two hundred fifty-three thousand, seven hundred fourteen".