1056621356616 has 128 divisors (see below), whose sum is σ = 3198735360000. Its totient is φ = 283934917632.

The previous prime is 1056621356611. The next prime is 1056621356657. The reversal of 1056621356616 is 6166531266501.

It is a super-2 number, since 2×1056621356616² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1056621356611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3981235 + ... + 4238333.

It is an arithmetic number, because the mean of its divisors is an integer number (24990120000).

Almost surely, 2^{1056621356616} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1056621356616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599367680000).

1056621356616 is an abundant number, since it is smaller than the sum of its proper divisors (2142114003384).

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

1056621356616 is a wasteful number, since it uses less digits than its factorization.

1056621356616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258571 (or 258567 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 1056621356616 in words is "one trillion, fifty-six billion, six hundred twenty-one million, three hundred fifty-six thousand, six hundred sixteen".