51455443555 has 8 divisors (see below), whose sum is σ = 61750442592. Its totient is φ = 41161747968.

The previous prime is 51455443511. The next prime is 51455443573. The reversal of 51455443555 is 55534455415.

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 51455443555 - 2⁹ = 51455443043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236799 + ... + 398728.

It is an arithmetic number, because the mean of its divisors is an integer number (7718805324).

Almost surely, 2^51455443555 is an apocalyptic number.

51455443555 is a deficient number, since it is larger than the sum of its proper divisors (10294999037).

51455443555 is a wasteful number, since it uses less digits than its factorization.

51455443555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651725.

The product of its digits is 3000000, while the sum is 46.

The spelling of 51455443555 in words is "fifty-one billion, four hundred fifty-five million, four hundred forty-three thousand, five hundred fifty-five".