51006147644 has 12 divisors (see below), whose sum is σ = 89267604384. Its totient is φ = 25501117824.

The previous prime is 51006147637. The next prime is 51006147649. The reversal of 51006147644 is 44674160015.

It is a junction number, because it is equal to n+sod(n) for n = 51006147598 and 51006147607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51006147649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429524 + ... + 535259.

It is an arithmetic number, because the mean of its divisors is an integer number (7438967032).

Almost surely, 2^51006147644 is an apocalyptic number.

It is an amenable number.

51006147644 is a deficient number, since it is larger than the sum of its proper divisors (38261456740).

51006147644 is a wasteful number, since it uses less digits than its factorization.

51006147644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978004 (or 978002 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 51006147644 in words is "fifty-one billion, six million, one hundred forty-seven thousand, six hundred forty-four".