10621831789648 has 60 divisors (see below), whose sum is σ = 21315527630748. Its totient is φ = 5127393617920.

The previous prime is 10621831789643. The next prime is 10621831789651. The reversal of 10621831789648 is 84698713812601.

It can be written as a sum of positive squares in 6 ways, for example, as 1671156023824 + 8950675765824 = 1292732^2 + 2991768^2 .

It is a super-2 number, since 2×10621831789648² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10621831789648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10621831789643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267122088 + ... + 267161848.

Almost surely, 2^{10621831789648} 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 10621831789648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10657763815374).

10621831789648 is an abundant number, since it is smaller than the sum of its proper divisors (10693695841100).

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

10621831789648 is a wasteful number, since it uses less digits than its factorization.

10621831789648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59680 (or 59645 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 10621831789648 in words is "ten trillion, six hundred twenty-one billion, eight hundred thirty-one million, seven hundred eighty-nine thousand, six hundred forty-eight".