5101661565 has 192 divisors, whose sum is σ = 12197832192. Its totient is φ = 1903564800.

The previous prime is 5101661561. The next prime is 5101661567. The reversal of 5101661565 is 5651661015.

It is not a de Polignac number, because 5101661565 - 2² = 5101661561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5101661561) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1665135 + ... + 1668195.

It is an arithmetic number, because the mean of its divisors is an integer number (63530376).

Almost surely, 2^5101661565 is an apocalyptic number.

5101661565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5101661565 is an abundant number, since it is smaller than the sum of its proper divisors (7096170627).

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

5101661565 is a wasteful number, since it uses less digits than its factorization.

5101661565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 5101661565 is about 71425.9166199497. The cubic root of 5101661565 is about 1721.4875319893.

It can be divided in two parts, 5101 and 661565, that added together give a palindrome (666666).

The spelling of 5101661565 in words is "five billion, one hundred one million, six hundred sixty-one thousand, five hundred sixty-five".