51688593232 has 10 divisors (see below), whose sum is σ = 100146649418. Its totient is φ = 25844296608.

The previous prime is 51688593223. The next prime is 51688593269. The reversal of 51688593232 is 23239588615.

It can be written as a sum of positive squares in only one way, i.e., 33115264576 + 18573328656 = 181976^2 + 136284^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51688593232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1615268523 + ... + 1615268554.

Almost surely, 2^51688593232 is an apocalyptic number.

It is an amenable number.

51688593232 is a deficient number, since it is larger than the sum of its proper divisors (48458056186).

51688593232 is a wasteful number, since it uses less digits than its factorization.

51688593232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230537085 (or 3230537079 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The spelling of 51688593232 in words is "fifty-one billion, six hundred eighty-eight million, five hundred ninety-three thousand, two hundred thirty-two".