51911481085 has 16 divisors (see below), whose sum is σ = 67171728960. Its totient is φ = 38383839360.

The previous prime is 51911481077. The next prime is 51911481101. The reversal of 51911481085 is 58018411915.

It is not a de Polignac number, because 51911481085 - 2³ = 51911481077 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6659967 + ... + 6667756.

It is an arithmetic number, because the mean of its divisors is an integer number (4198233060).

Almost surely, 2^51911481085 is an apocalyptic number.

It is an amenable number.

51911481085 is a deficient number, since it is larger than the sum of its proper divisors (15260247875).

51911481085 is a wasteful number, since it uses less digits than its factorization.

51911481085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13327788.

The product of its (nonzero) digits is 57600, while the sum is 43.

The spelling of 51911481085 in words is "fifty-one billion, nine hundred eleven million, four hundred eighty-one thousand, eighty-five".