51220728934 has 8 divisors (see below), whose sum is σ = 76961982888. Its totient is φ = 25566734640.

The previous prime is 51220728929. The next prime is 51220728943. The reversal of 51220728934 is 43982702215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21813447 + ... + 21815794.

It is an arithmetic number, because the mean of its divisors is an integer number (9620247861).

Almost surely, 2^51220728934 is an apocalyptic number.

51220728934 is a deficient number, since it is larger than the sum of its proper divisors (25741253954).

51220728934 is a wasteful number, since it uses less digits than its factorization.

51220728934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43629830.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 51220728934 in words is "fifty-one billion, two hundred twenty million, seven hundred twenty-eight thousand, nine hundred thirty-four".