51402383651 has 4 divisors (see below), whose sum is σ = 51404325000. Its totient is φ = 51400442304.

The previous prime is 51402383629. The next prime is 51402383701. The reversal of 51402383651 is 15638320415.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51402383651 - 2³⁰ = 50328641827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51402380651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930401 + ... + 984098.

It is an arithmetic number, because the mean of its divisors is an integer number (12851081250).

Almost surely, 2^51402383651 is an apocalyptic number.

51402383651 is a deficient number, since it is larger than the sum of its proper divisors (1941349).

51402383651 is a wasteful number, since it uses less digits than its factorization.

51402383651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941348.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 51402383651 in words is "fifty-one billion, four hundred two million, three hundred eighty-three thousand, six hundred fifty-one".