51406430320506 has 16 divisors (see below), whose sum is σ = 102813392924064. Its totient is φ = 17135388059664.

The previous prime is 51406430320471. The next prime is 51406430320549. The reversal of 51406430320506 is 60502303460415.

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, 20917441 + ... + 23245476.

It is an arithmetic number, because the mean of its divisors is an integer number (6425837057754).

Almost surely, 2^{51406430320506} is an apocalyptic number.

51406430320506 is an abundant number, since it is smaller than the sum of its proper divisors (51406962603558).

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

51406430320506 is a wasteful number, since it uses less digits than its factorization.

51406430320506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44356925.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 51406430320506 in words is "fifty-one trillion, four hundred six billion, four hundred thirty million, three hundred twenty thousand, five hundred six".