51456347620 has 24 divisors (see below), whose sum is σ = 108068716224. Its totient is φ = 20580560736.

The previous prime is 51456347597. The next prime is 51456347633. The reversal of 51456347620 is 2674365415.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99457 + ... + 335863.

It is an arithmetic number, because the mean of its divisors is an integer number (4502863176).

Almost surely, 2^51456347620 is an apocalyptic number.

It is an amenable number.

51456347620 is an abundant number, since it is smaller than the sum of its proper divisors (56612368604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51456347620 is a wasteful number, since it uses less digits than its factorization.

51456347620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247299 (or 247297 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 51456347620 in words is "fifty-one billion, four hundred fifty-six million, three hundred forty-seven thousand, six hundred twenty".