81546877762 has 16 divisors (see below), whose sum is σ = 140326192512. Its totient is φ = 34815775680.

The previous prime is 81546877747. The next prime is 81546877801. The reversal of 81546877762 is 26777864518.

It is a self number, because there is not a number n which added to its sum of digits gives 81546877762.

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, 11070039 + ... + 11077402.

It is an arithmetic number, because the mean of its divisors is an integer number (8770387032).

Almost surely, 2^81546877762 is an apocalyptic number.

81546877762 is a deficient number, since it is larger than the sum of its proper divisors (58779314750).

81546877762 is a wasteful number, since it uses less digits than its factorization.

81546877762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22147713.

The product of its digits is 31610880, while the sum is 61.

It can be divided in two parts, 8154687 and 7762, that added together give a square (8162449 = 2857²).

The spelling of 81546877762 in words is "eighty-one billion, five hundred forty-six million, eight hundred seventy-seven thousand, seven hundred sixty-two".