51473646511 has 4 divisors (see below), whose sum is σ = 58827024592. Its totient is φ = 44120268432.

The previous prime is 51473646493. The next prime is 51473646577. The reversal of 51473646511 is 11564637415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51473646511 - 2²³ = 51465257903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51473646011) 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, 3676689030 + ... + 3676689043.

It is an arithmetic number, because the mean of its divisors is an integer number (14706756148).

Almost surely, 2^51473646511 is an apocalyptic number.

51473646511 is a deficient number, since it is larger than the sum of its proper divisors (7353378081).

51473646511 is an equidigital number, since it uses as much as digits as its factorization.

51473646511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7353378080.

The product of its digits is 302400, while the sum is 43.

The spelling of 51473646511 in words is "fifty-one billion, four hundred seventy-three million, six hundred forty-six thousand, five hundred eleven".