1081720477783 has 64 divisors (see below), whose sum is σ = 1283643998208. Its totient is φ = 901674385920.

The previous prime is 1081720477757. The next prime is 1081720477823. The reversal of 1081720477783 is 3877740271801.

It is not a de Polignac number, because 1081720477783 - 2⁵ = 1081720477751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081720477283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 126616410 + ... + 126624952.

It is an arithmetic number, because the mean of its divisors is an integer number (20056937472).

Almost surely, 2^{1081720477783} is an apocalyptic number.

1081720477783 is a deficient number, since it is larger than the sum of its proper divisors (201923520425).

1081720477783 is a wasteful number, since it uses less digits than its factorization.

1081720477783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8836.

The product of its (nonzero) digits is 3687936, while the sum is 55.

The spelling of 1081720477783 in words is "one trillion, eighty-one billion, seven hundred twenty million, four hundred seventy-seven thousand, seven hundred eighty-three".