51123455447 has 8 divisors (see below), whose sum is σ = 52276107456. Its totient is φ = 49977768672.

The previous prime is 51123455441. The next prime is 51123455491. The reversal of 51123455447 is 74455432115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51123455447 - 2⁸ = 51123455191 is a prime.

It is a super-2 number, since 2×51123455447² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123455441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1726463 + ... + 1755824.

It is an arithmetic number, because the mean of its divisors is an integer number (6534513432).

Almost surely, 2^51123455447 is an apocalyptic number.

51123455447 is a deficient number, since it is larger than the sum of its proper divisors (1152652009).

51123455447 is a wasteful number, since it uses less digits than its factorization.

51123455447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482617.

The product of its digits is 336000, while the sum is 41.

The spelling of 51123455447 in words is "fifty-one billion, one hundred twenty-three million, four hundred fifty-five thousand, four hundred forty-seven".