51569339461 has 8 divisors (see below), whose sum is σ = 51805050264. Its totient is φ = 51333999360.

The previous prime is 51569339443. The next prime is 51569339477. The reversal of 51569339461 is 16493396515.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14545807236 + 37023532225 = 120606^2 + 192415^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51569339461 - 2²⁹ = 51032468549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51569339399 and 51569339408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51569339431) 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, 188121 + ... + 372193.

It is an arithmetic number, because the mean of its divisors is an integer number (6475631283).

Almost surely, 2^51569339461 is an apocalyptic number.

It is an amenable number.

51569339461 is a deficient number, since it is larger than the sum of its proper divisors (235710803).

51569339461 is a wasteful number, since it uses less digits than its factorization.

51569339461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185351.

The product of its digits is 2624400, while the sum is 52.

The spelling of 51569339461 in words is "fifty-one billion, five hundred sixty-nine million, three hundred thirty-nine thousand, four hundred sixty-one".