81598854284 has 24 divisors (see below), whose sum is σ = 148628368560. Its totient is φ = 39150869184.

The previous prime is 81598854283. The next prime is 81598854289. The reversal of 81598854284 is 48245889518.

It is a super-2 number, since 2×81598854284² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81598854283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2138879 + ... + 2176694.

It is an arithmetic number, because the mean of its divisors is an integer number (6192848690).

Almost surely, 2^81598854284 is an apocalyptic number.

It is an amenable number.

81598854284 is a deficient number, since it is larger than the sum of its proper divisors (67029514276).

81598854284 is a wasteful number, since it uses less digits than its factorization.

81598854284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315769 (or 4315767 counting only the distinct ones).

The product of its digits is 29491200, while the sum is 62.

The spelling of 81598854284 in words is "eighty-one billion, five hundred ninety-eight million, eight hundred fifty-four thousand, two hundred eighty-four".