1020656130661 has 24 divisors (see below), whose sum is σ = 1124305786944. Its totient is φ = 924675523200.

The previous prime is 1020656130649. The next prime is 1020656130667. The reversal of 1020656130661 is 1660316560201.

It is not a de Polignac number, because 1020656130661 - 2¹⁵ = 1020656097893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020656130661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020656130667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41926285 + ... + 41950621.

It is an arithmetic number, because the mean of its divisors is an integer number (46846074456).

Almost surely, 2^{1020656130661} is an apocalyptic number.

It is an amenable number.

1020656130661 is a deficient number, since it is larger than the sum of its proper divisors (103649656283).

1020656130661 is a wasteful number, since it uses less digits than its factorization.

1020656130661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29449 (or 29430 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 1020656130661 in words is "one trillion, twenty billion, six hundred fifty-six million, one hundred thirty thousand, six hundred sixty-one".