11317457550 has 192 divisors, whose sum is σ = 33095881728. Its totient is φ = 2505600000.

The previous prime is 11317457539. The next prime is 11317457561. The reversal of 11317457550 is 5575471311.

It is an interprime number because it is at equal distance from previous prime (11317457539) and next prime (11317457561).

It is a junction number, because it is equal to n+sod(n) for n = 11317457499 and 11317457508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6499680 + ... + 6501420.

It is an arithmetic number, because the mean of its divisors is an integer number (172374384).

Almost surely, 2^11317457550 is an apocalyptic number.

11317457550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11317457550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16547940864).

11317457550 is an abundant number, since it is smaller than the sum of its proper divisors (21778424178).

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

11317457550 is a wasteful number, since it uses less digits than its factorization.

11317457550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 39.

It can be divided in two parts, 1131745 and 7550, that added together give a triangular number (1139295 = T₁₅₀₉).

The spelling of 11317457550 in words is "eleven billion, three hundred seventeen million, four hundred fifty-seven thousand, five hundred fifty".