51566561456 has 10 divisors (see below), whose sum is σ = 99910212852. Its totient is φ = 25783280720.

The previous prime is 51566561447. The next prime is 51566561489. The reversal of 51566561456 is 65416566515.

It is a happy number.

It is a super-2 number, since 2×51566561456² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611455030 + ... + 1611455061.

Almost surely, 2^51566561456 is an apocalyptic number.

It is an amenable number.

51566561456 is a deficient number, since it is larger than the sum of its proper divisors (48343651396).

51566561456 is a wasteful number, since it uses less digits than its factorization.

51566561456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222910099 (or 3222910093 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 50.

The spelling of 51566561456 in words is "fifty-one billion, five hundred sixty-six million, five hundred sixty-one thousand, four hundred fifty-six".