1311352156620 has 144 divisors (see below), whose sum is σ = 4353338545920. Its totient is φ = 316881206400.

The previous prime is 1311352156591. The next prime is 1311352156643. The reversal of 1311352156620 is 266512531131.

1311352156620 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 3 + 5 + 21 + 5 + 6 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 449010 + ... + 1680569.

It is an arithmetic number, because the mean of its divisors is an integer number (30231517680).

Almost surely, 2^{1311352156620} is an apocalyptic number.

1311352156620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311352156620 is an abundant number, since it is smaller than the sum of its proper divisors (3041986389300).

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

1311352156620 is a wasteful number, since it uses less digits than its factorization.

1311352156620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129916 (or 2129911 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

Adding to 1311352156620 its reverse (266512531131), we get a palindrome (1577864687751).

The spelling of 1311352156620 in words is "one trillion, three hundred eleven billion, three hundred fifty-two million, one hundred fifty-six thousand, six hundred twenty".