51481937779 has 8 divisors (see below), whose sum is σ = 52752687120. Its totient is φ = 50211907200.

The previous prime is 51481937761. The next prime is 51481937809. The reversal of 51481937779 is 97773918415.

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 51481937779 - 2²⁷ = 51347720051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51481937279) 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, 33217 + ... + 322594.

It is an arithmetic number, because the mean of its divisors is an integer number (6594085890).

Almost surely, 2^51481937779 is an apocalyptic number.

51481937779 is a deficient number, since it is larger than the sum of its proper divisors (1270749341).

51481937779 is a wasteful number, since it uses less digits than its factorization.

51481937779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359381.

The product of its digits is 13335840, while the sum is 61.

The spelling of 51481937779 in words is "fifty-one billion, four hundred eighty-one million, nine hundred thirty-seven thousand, seven hundred seventy-nine".