81744677468632 has 16 divisors (see below), whose sum is σ = 153302801137200. Its totient is φ = 40863930498720.

The previous prime is 81744677468621. The next prime is 81744677468659. The reversal of 81744677468632 is 23686477644718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050988132 + ... + 1051065907.

It is an arithmetic number, because the mean of its divisors is an integer number (9581425071075).

Almost surely, 2^{81744677468632} is an apocalyptic number.

It is an amenable number.

81744677468632 is a deficient number, since it is larger than the sum of its proper divisors (71558123668568).

81744677468632 is a wasteful number, since it uses less digits than its factorization.

81744677468632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102058906 (or 2102058902 counting only the distinct ones).

The product of its digits is 1820786688, while the sum is 73.

The spelling of 81744677468632 in words is "eighty-one trillion, seven hundred forty-four billion, six hundred seventy-seven million, four hundred sixty-eight thousand, six hundred thirty-two".