51516165446 has 16 divisors (see below), whose sum is σ = 78063575040. Its totient is φ = 25495916040.

The previous prime is 51516165431. The next prime is 51516165479. The reversal of 51516165446 is 64456161515.

It is a junction number, because it is equal to n+sod(n) for n = 51516165397 and 51516165406.

It is a congruent number.

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, 125816 + ... + 344763.

It is an arithmetic number, because the mean of its divisors is an integer number (4878973440).

Almost surely, 2^51516165446 is an apocalyptic number.

51516165446 is a deficient number, since it is larger than the sum of its proper divisors (26547409594).

51516165446 is a wasteful number, since it uses less digits than its factorization.

51516165446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471139.

The product of its digits is 432000, while the sum is 44.

The spelling of 51516165446 in words is "fifty-one billion, five hundred sixteen million, one hundred sixty-five thousand, four hundred forty-six".