51566252463 has 48 divisors (see below), whose sum is σ = 83770891776. Its totient is φ = 30291433920.

The previous prime is 51566252459. The next prime is 51566252599. The reversal of 51566252463 is 36425266515.

51566252463 is a `hidden beast` number, since 5 + 1 + 5 + 6 + 62 + 524 + 63 = 666.

It is not a de Polignac number, because 51566252463 - 2² = 51566252459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51566252063) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 936606 + ... + 990132.

It is an arithmetic number, because the mean of its divisors is an integer number (1745226912).

Almost surely, 2^51566252463 is an apocalyptic number.

51566252463 is a deficient number, since it is larger than the sum of its proper divisors (32204639313).

51566252463 is a wasteful number, since it uses less digits than its factorization.

51566252463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53844 (or 53841 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 51566252463 in words is "fifty-one billion, five hundred sixty-six million, two hundred fifty-two thousand, four hundred sixty-three".