51446215079 has 4 divisors (see below), whose sum is σ = 58795674384. Its totient is φ = 44096755776.

The previous prime is 51446215063. The next prime is 51446215091. The reversal of 51446215079 is 97051264415.

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 51446215079 - 2⁴ = 51446215063 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 (51446215019) 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, 3674729642 + ... + 3674729655.

It is an arithmetic number, because the mean of its divisors is an integer number (14698918596).

Almost surely, 2^51446215079 is an apocalyptic number.

51446215079 is a deficient number, since it is larger than the sum of its proper divisors (7349459305).

51446215079 is an equidigital number, since it uses as much as digits as its factorization.

51446215079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7349459304.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 51446215079 in words is "fifty-one billion, four hundred forty-six million, two hundred fifteen thousand, seventy-nine".