51947019079 has 4 divisors (see below), whose sum is σ = 51961902840. Its totient is φ = 51932135320.

The previous prime is 51947019067. The next prime is 51947019199. The reversal of 51947019079 is 97091074915.

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 51947019079 - 2⁹ = 51947018567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51947019049) 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, 7436644 + ... + 7443625.

It is an arithmetic number, because the mean of its divisors is an integer number (12990475710).

Almost surely, 2^51947019079 is an apocalyptic number.

51947019079 is a deficient number, since it is larger than the sum of its proper divisors (14883761).

51947019079 is a wasteful number, since it uses less digits than its factorization.

51947019079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14883760.

The product of its (nonzero) digits is 714420, while the sum is 52.

The spelling of 51947019079 in words is "fifty-one billion, nine hundred forty-seven million, nineteen thousand, seventy-nine".