1081720477772 has 12 divisors (see below), whose sum is σ = 2065102730376. Its totient is φ = 491691126240.

The previous prime is 1081720477757. The next prime is 1081720477823. The reversal of 1081720477772 is 2777740271801.

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, 12292278113 + ... + 12292278200.

It is an arithmetic number, because the mean of its divisors is an integer number (172091894198).

Almost surely, 2^{1081720477772} is an apocalyptic number.

It is an amenable number.

1081720477772 is a deficient number, since it is larger than the sum of its proper divisors (983382252604).

1081720477772 is a wasteful number, since it uses less digits than its factorization.

1081720477772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24584556328 (or 24584556326 counting only the distinct ones).

The product of its (nonzero) digits is 2151296, while the sum is 53.

The spelling of 1081720477772 in words is "one trillion, eighty-one billion, seven hundred twenty million, four hundred seventy-seven thousand, seven hundred seventy-two".