13165549650 has 240 divisors, whose sum is σ = 41197863168. Its totient is φ = 3088368000.

The previous prime is 13165549643. The next prime is 13165549687. The reversal of 13165549650 is 5694556131.

13165549650 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 554 + 96 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 13165549596 and 13165549605.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1376284 + ... + 1385816.

Almost surely, 2^13165549650 is an apocalyptic number.

13165549650 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 13165549650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20598931584).

13165549650 is an abundant number, since it is smaller than the sum of its proper divisors (28032313518).

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

13165549650 is a wasteful number, since it uses less digits than its factorization.

13165549650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9599 (or 9585 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 13165549650 in words is "thirteen billion, one hundred sixty-five million, five hundred forty-nine thousand, six hundred fifty".