51205414154849 has 8 divisors (see below), whose sum is σ = 51221592379200. Its totient is φ = 51189238493136.

The previous prime is 51205414154827. The next prime is 51205414154897. The reversal of 51205414154849 is 94845141450215.

It is a happy number.

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 51205414154849 - 2¹² = 51205414150753 is a prime.

It is a super-2 number, since 2×51205414154849² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51205414154849.

It is not an unprimeable number, because it can be changed into a prime (51205414144849) 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 7 ways as a sum of consecutive naturals, for example, 39729452 + ... + 40998050.

It is an arithmetic number, because the mean of its divisors is an integer number (6402699047400).

Almost surely, 2^{51205414154849} is an apocalyptic number.

It is an amenable number.

51205414154849 is a deficient number, since it is larger than the sum of its proper divisors (16178224351).

51205414154849 is a wasteful number, since it uses less digits than its factorization.

51205414154849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281319.

The product of its (nonzero) digits is 4608000, while the sum is 53.

The spelling of 51205414154849 in words is "fifty-one trillion, two hundred five billion, four hundred fourteen million, one hundred fifty-four thousand, eight hundred forty-nine".