51451384804 has 6 divisors (see below), whose sum is σ = 90039923414. Its totient is φ = 25725692400.

The previous prime is 51451384793. The next prime is 51451384921. The reversal of 51451384804 is 40848315415.

It can be written as a sum of positive squares in only one way, i.e., 50333819904 + 1117564900 = 224352^2 + 33430^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6431423097 + ... + 6431423104.

Almost surely, 2^51451384804 is an apocalyptic number.

It is an amenable number.

51451384804 is a deficient number, since it is larger than the sum of its proper divisors (38588538610).

51451384804 is a wasteful number, since it uses less digits than its factorization.

51451384804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12862846205 (or 12862846203 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 43.

The spelling of 51451384804 in words is "fifty-one billion, four hundred fifty-one million, three hundred eighty-four thousand, eight hundred four".