51566682497 has 4 divisors (see below), whose sum is σ = 56254562736. Its totient is φ = 46878802260.

The previous prime is 51566682481. The next prime is 51566682529. The reversal of 51566682497 is 79428666515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51566682497 - 2⁴ = 51566682481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51566682467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2343940103 + ... + 2343940124.

It is an arithmetic number, because the mean of its divisors is an integer number (14063640684).

Almost surely, 2^51566682497 is an apocalyptic number.

It is an amenable number.

51566682497 is a deficient number, since it is larger than the sum of its proper divisors (4687880239).

51566682497 is a wasteful number, since it uses less digits than its factorization.

51566682497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687880238.

The product of its digits is 21772800, while the sum is 59.

The spelling of 51566682497 in words is "fifty-one billion, five hundred sixty-six million, six hundred eighty-two thousand, four hundred ninety-seven".