51620730830 has 32 divisors (see below), whose sum is σ = 97937177760. Its totient is φ = 19535644800.

The previous prime is 51620730817. The next prime is 51620730853. The reversal of 51620730830 is 3803702615.

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 in 15 ways as a sum of consecutive naturals, for example, 35621 + ... + 323280.

It is an arithmetic number, because the mean of its divisors is an integer number (3060536805).

Almost surely, 2^51620730830 is an apocalyptic number.

51620730830 is a deficient number, since it is larger than the sum of its proper divisors (46316446930).

51620730830 is a wasteful number, since it uses less digits than its factorization.

51620730830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359684.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 51620730830 in words is "fifty-one billion, six hundred twenty million, seven hundred thirty thousand, eight hundred thirty".