81457286350 has 96 divisors (see below), whose sum is σ = 169571325312. Its totient is φ = 28861680000.

The previous prime is 81457286329. The next prime is 81457286357. The reversal of 81457286350 is 5368275418.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 81457286294 and 81457286303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81457286357) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3578505 + ... + 3601195.

It is an arithmetic number, because the mean of its divisors is an integer number (1766367972).

Almost surely, 2^81457286350 is an apocalyptic number.

81457286350 is an abundant number, since it is smaller than the sum of its proper divisors (88114038962).

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

81457286350 is a wasteful number, since it uses less digits than its factorization.

81457286350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22882 (or 22877 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 81457286350 in words is "eighty-one billion, four hundred fifty-seven million, two hundred eighty-six thousand, three hundred fifty".