51206403623015 has 16 divisors (see below), whose sum is σ = 61464616536576. Its totient is φ = 40953835677600.

The previous prime is 51206403622949. The next prime is 51206403623017. The reversal of 51206403623015 is 51032630460215.

It is not a de Polignac number, because 51206403623015 - 2⁴⁰ = 50106891995239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51206403623015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51206403623017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647233310 + ... + 647312420.

It is an arithmetic number, because the mean of its divisors is an integer number (3841538533536).

Almost surely, 2^{51206403623015} is an apocalyptic number.

51206403623015 is a deficient number, since it is larger than the sum of its proper divisors (10258212913561).

51206403623015 is a wasteful number, since it uses less digits than its factorization.

51206403623015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113150.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 51206403623015 in words is "fifty-one trillion, two hundred six billion, four hundred three million, six hundred twenty-three thousand, fifteen".