1020775731644 has 6 divisors (see below), whose sum is σ = 1786357530384. Its totient is φ = 510387865820.

The previous prime is 1020775731637. The next prime is 1020775731667. The reversal of 1020775731644 is 4461375770201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127596966452 + ... + 127596966459.

It is an arithmetic number, because the mean of its divisors is an integer number (297726255064).

Almost surely, 2^{1020775731644} is an apocalyptic number.

It is an amenable number.

1020775731644 is a deficient number, since it is larger than the sum of its proper divisors (765581798740).

1020775731644 is a wasteful number, since it uses less digits than its factorization.

1020775731644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255193932915 (or 255193932913 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 1020775731644 in words is "one trillion, twenty billion, seven hundred seventy-five million, seven hundred thirty-one thousand, six hundred forty-four".