5209691551 has 8 divisors (see below), whose sum is σ = 5311830960. Its totient is φ = 5107694592.

The previous prime is 5209691537. The next prime is 5209691569. The reversal of 5209691551 is 1551969025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5209691551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5209691498 and 5209691507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5209661551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39796 + ... + 109558.

It is an arithmetic number, because the mean of its divisors is an integer number (663978870).

Almost surely, 2^5209691551 is an apocalyptic number.

5209691551 is a deficient number, since it is larger than the sum of its proper divisors (102139409).

5209691551 is a wasteful number, since it uses less digits than its factorization.

5209691551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71225.

The product of its (nonzero) digits is 121500, while the sum is 43.

The square root of 5209691551 is about 72178.1930433285. The cubic root of 5209691551 is about 1733.5538504658.

The spelling of 5209691551 in words is "five billion, two hundred nine million, six hundred ninety-one thousand, five hundred fifty-one".