11531211432356 has 72 divisors (see below), whose sum is σ = 25595718744960. Its totient is φ = 4449061393920.

The previous prime is 11531211432341. The next prime is 11531211432361. The reversal of 11531211432356 is 65323411213511.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16173101 + ... + 16871028.

It is an arithmetic number, because the mean of its divisors is an integer number (355496093680).

Almost surely, 2^{11531211432356} is an apocalyptic number.

It is an amenable number.

11531211432356 is an abundant number, since it is smaller than the sum of its proper divisors (14064507312604).

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

11531211432356 is a wasteful number, since it uses less digits than its factorization.

11531211432356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33044265 (or 33044252 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

Adding to 11531211432356 its reverse (65323411213511), we get a palindrome (76854622645867).

The spelling of 11531211432356 in words is "eleven trillion, five hundred thirty-one billion, two hundred eleven million, four hundred thirty-two thousand, three hundred fifty-six".