81852724546 has 16 divisors (see below), whose sum is σ = 129520310400. Its totient is φ = 38688593328.

The previous prime is 81852724531. The next prime is 81852724559. The reversal of 81852724546 is 64542725818.

It is a super-2 number, since 2×81852724546² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81852724493 and 81852724502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2308561 + ... + 2343748.

It is an arithmetic number, because the mean of its divisors is an integer number (8095019400).

Almost surely, 2^81852724546 is an apocalyptic number.

81852724546 is a deficient number, since it is larger than the sum of its proper divisors (47667585854).

81852724546 is a wasteful number, since it uses less digits than its factorization.

81852724546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652793.

The product of its digits is 4300800, while the sum is 52.

It can be divided in two parts, 8185272 and 4546, that added together give a palindrome (8189818).

The spelling of 81852724546 in words is "eighty-one billion, eight hundred fifty-two million, seven hundred twenty-four thousand, five hundred forty-six".