51355262644 has 48 divisors (see below), whose sum is σ = 103048865920. Its totient is φ = 21937029120.

The previous prime is 51355262641. The next prime is 51355262671. The reversal of 51355262644 is 44626255315.

It is a self number, because there is not a number n which added to its sum of digits gives 51355262644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51355262641) 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 15 ways as a sum of consecutive naturals, for example, 12292684 + ... + 12296860.

Almost surely, 2^51355262644 is an apocalyptic number.

It is an amenable number.

51355262644 is an abundant number, since it is smaller than the sum of its proper divisors (51693603276).

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

51355262644 is a wasteful number, since it uses less digits than its factorization.

51355262644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5528 (or 5526 counting only the distinct ones).

The product of its digits is 864000, while the sum is 43.

The spelling of 51355262644 in words is "fifty-one billion, three hundred fifty-five million, two hundred sixty-two thousand, six hundred forty-four".