81773019130 has 16 divisors (see below), whose sum is σ = 160572474144. Its totient is φ = 29735643280.

The previous prime is 81773019079. The next prime is 81773019143. The reversal of 81773019130 is 3191037718.

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, 371695432 + ... + 371695651.

It is an arithmetic number, because the mean of its divisors is an integer number (10035779634).

Almost surely, 2^81773019130 is an apocalyptic number.

81773019130 is a deficient number, since it is larger than the sum of its proper divisors (78799455014).

81773019130 is a wasteful number, since it uses less digits than its factorization.

81773019130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743391101.

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 81773019130 in words is "eighty-one billion, seven hundred seventy-three million, nineteen thousand, one hundred thirty".