1226356311540 has 96 divisors (see below), whose sum is σ = 3455288073216. Its totient is φ = 324985282560.

The previous prime is 1226356311533. The next prime is 1226356311547. The reversal of 1226356311540 is 451136536221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1226356311533) and next prime (1226356311547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226356311547) 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, 10840509 + ... + 10953051.

It is an arithmetic number, because the mean of its divisors is an integer number (35992584096).

Almost surely, 2^{1226356311540} is an apocalyptic number.

1226356311540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226356311540 is an abundant number, since it is smaller than the sum of its proper divisors (2228931761676).

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

1226356311540 is a wasteful number, since it uses less digits than its factorization.

1226356311540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113689 (or 113687 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 1226356311540 in words is "one trillion, two hundred twenty-six billion, three hundred fifty-six million, three hundred eleven thousand, five hundred forty".