51649536002 has 4 divisors (see below), whose sum is σ = 77474304006. Its totient is φ = 25824768000.

The previous prime is 51649535933. The next prime is 51649536013. The reversal of 51649536002 is 20063594615.

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

It can be written as a sum of positive squares in only one way, i.e., 41013945361 + 10635590641 = 202519^2 + 103129^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12912383999 + ... + 12912384002.

Almost surely, 2^51649536002 is an apocalyptic number.

51649536002 is a deficient number, since it is larger than the sum of its proper divisors (25824768004).

51649536002 is a wasteful number, since it uses less digits than its factorization.

51649536002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25824768003.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 51649536002 in words is "fifty-one billion, six hundred forty-nine million, five hundred thirty-six thousand, two".