1317157149056 has 96 divisors (see below), whose sum is σ = 3053529776880. Its totient is φ = 564293667840.

The previous prime is 1317157149053. The next prime is 1317157149097. The reversal of 1317157149056 is 6509417517131.

It is a super-2 number, since 2×1317157149056² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1317157148995 and 1317157149013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317157149053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18171446 + ... + 18243786.

Almost surely, 2^{1317157149056} is an apocalyptic number.

1317157149056 is a gapful number since it is divisible by the number (16) 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 1317157149056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526764888440).

1317157149056 is an abundant number, since it is smaller than the sum of its proper divisors (1736372627824).

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

1317157149056 is an equidigital number, since it uses as much as digits as its factorization.

1317157149056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75272 (or 75253 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 50.

The spelling of 1317157149056 in words is "one trillion, three hundred seventeen billion, one hundred fifty-seven million, one hundred forty-nine thousand, fifty-six".