1156311403572 has 96 divisors (see below), whose sum is σ = 2988783371392. Its totient is φ = 345632749056.

The previous prime is 1156311403571. The next prime is 1156311403607. The reversal of 1156311403572 is 2753041136511.

It is a super-3 number, since 3×1156311403572³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1156311403572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156311403571) 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 31 ways as a sum of consecutive naturals, for example, 3555618 + ... + 3867174.

Almost surely, 2^{1156311403572} is an apocalyptic number.

1156311403572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156311403572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1494391685696).

1156311403572 is an abundant number, since it is smaller than the sum of its proper divisors (1832471967820).

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

1156311403572 is a wasteful number, since it uses less digits than its factorization.

1156311403572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312257 (or 312255 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 1156311403572 in words is "one trillion, one hundred fifty-six billion, three hundred eleven million, four hundred three thousand, five hundred seventy-two".