5209502169690 has 432 divisors, whose sum is σ = 17086910539608. Its totient is φ = 1091504139264.

The previous prime is 5209502169673. The next prime is 5209502169701. The reversal of 5209502169690 is 969612059025.

5209502169690 is a `hidden beast` number, since 5 + 209 + 50 + 216 + 96 + 90 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 621248205249 + 4588253964441 = 788193^2 + 2142021^2 .

It is a super-2 number, since 2×5209502169690² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 1272781284 + ... + 1272785376.

Almost surely, 2^{5209502169690} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5209502169690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8543455269804).

5209502169690 is an abundant number, since it is smaller than the sum of its proper divisors (11877408369918).

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

5209502169690 is a wasteful number, since it uses less digits than its factorization.

5209502169690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431 (or 4272 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 5209502169690 in words is "five trillion, two hundred nine billion, five hundred two million, one hundred sixty-nine thousand, six hundred ninety".