51987756326 has 16 divisors (see below), whose sum is σ = 85562619408. Its totient is φ = 23494202400.

The previous prime is 51987756311. The next prime is 51987756349. The reversal of 51987756326 is 62365778915.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6825905 + ... + 6833516.

It is an arithmetic number, because the mean of its divisors is an integer number (5347663713).

Almost surely, 2^51987756326 is an apocalyptic number.

51987756326 is a deficient number, since it is larger than the sum of its proper divisors (33574863082).

51987756326 is a wasteful number, since it uses less digits than its factorization.

51987756326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13659607.

The product of its digits is 19051200, while the sum is 59.

The spelling of 51987756326 in words is "fifty-one billion, nine hundred eighty-seven million, seven hundred fifty-six thousand, three hundred twenty-six".