51667820830 has 64 divisors (see below), whose sum is σ = 96107964480. Its totient is φ = 19984333824.

The previous prime is 51667820819. The next prime is 51667820837. The reversal of 51667820830 is 3802876615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51667820837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76318452 + ... + 76319128.

It is an arithmetic number, because the mean of its divisors is an integer number (1501686945).

Almost surely, 2^51667820830 is an apocalyptic number.

51667820830 is a deficient number, since it is larger than the sum of its proper divisors (44440143650).

51667820830 is a wasteful number, since it uses less digits than its factorization.

51667820830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 51667820830 in words is "fifty-one billion, six hundred sixty-seven million, eight hundred twenty thousand, eight hundred thirty".