1020775731636 has 96 divisors (see below), whose sum is σ = 2449017704448. Its totient is φ = 330762418560.

The previous prime is 1020775731631. The next prime is 1020775731637. The reversal of 1020775731636 is 6361375770201.

It is a super-2 number, since 2×1020775731636² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020775731631) 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 31 ways as a sum of consecutive naturals, for example, 59850486 + ... + 59867538.

It is an arithmetic number, because the mean of its divisors is an integer number (25510601088).

Almost surely, 2^{1020775731636} is an apocalyptic number.

It is an amenable number.

1020775731636 is an abundant number, since it is smaller than the sum of its proper divisors (1428241972812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020775731636 is a wasteful number, since it uses less digits than its factorization.

1020775731636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17821 (or 17819 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 48.

The spelling of 1020775731636 in words is "one trillion, twenty billion, seven hundred seventy-five million, seven hundred thirty-one thousand, six hundred thirty-six".