1026644611540 has 12 divisors (see below), whose sum is σ = 2155953684276. Its totient is φ = 410657844608.

The previous prime is 1026644611459. The next prime is 1026644611547. The reversal of 1026644611540 is 451164466201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 331575582276 + 695069029264 = 575826^2 + 833708^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1026644611493 and 1026644611502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026644611547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25666115269 + ... + 25666115308.

It is an arithmetic number, because the mean of its divisors is an integer number (179662807023).

Almost surely, 2^{1026644611540} is an apocalyptic number.

1026644611540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1026644611540 is an abundant number, since it is smaller than the sum of its proper divisors (1129309072736).

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

1026644611540 is a wasteful number, since it uses less digits than its factorization.

1026644611540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51332230586 (or 51332230584 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 1026644611540 in words is "one trillion, twenty-six billion, six hundred forty-four million, six hundred eleven thousand, five hundred forty".