51667711487 has 16 divisors (see below), whose sum is σ = 59147040000. Its totient is φ = 44213015808.

The previous prime is 51667711483. The next prime is 51667711523. The reversal of 51667711487 is 78411776615.

It is a cyclic number.

It is not a de Polignac number, because 51667711487 - 2² = 51667711483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51667711481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15622088 + ... + 15625394.

It is an arithmetic number, because the mean of its divisors is an integer number (3696690000).

Almost surely, 2^51667711487 is an apocalyptic number.

51667711487 is a deficient number, since it is larger than the sum of its proper divisors (7479328513).

51667711487 is a wasteful number, since it uses less digits than its factorization.

51667711487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6350.

The product of its digits is 1975680, while the sum is 53.

The spelling of 51667711487 in words is "fifty-one billion, six hundred sixty-seven million, seven hundred eleven thousand, four hundred eighty-seven".