51408565534 has 4 divisors (see below), whose sum is σ = 77112848304. Its totient is φ = 25704282766.

The previous prime is 51408565517. The next prime is 51408565589. The reversal of 51408565534 is 43556580415.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×51408565534² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12852141382 + ... + 12852141385.

It is an arithmetic number, because the mean of its divisors is an integer number (19278212076).

Almost surely, 2^51408565534 is an apocalyptic number.

51408565534 is a deficient number, since it is larger than the sum of its proper divisors (25704282770).

51408565534 is a wasteful number, since it uses less digits than its factorization.

51408565534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25704282769.

The product of its (nonzero) digits is 1440000, while the sum is 46.

The spelling of 51408565534 in words is "fifty-one billion, four hundred eight million, five hundred sixty-five thousand, five hundred thirty-four".