51204666640215 has 64 divisors (see below), whose sum is σ = 93743969863680. Its totient is φ = 23641571082240.

The previous prime is 51204666640201. The next prime is 51204666640219.

It is a happy number.

51204666640215 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51204666640215 - 2⁶ = 51204666640151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51204666640219) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 88940010 + ... + 89513879.

It is an arithmetic number, because the mean of its divisors is an integer number (1464749529120).

Almost surely, 2^{51204666640215} is an apocalyptic number.

51204666640215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51204666640215 is a deficient number, since it is larger than the sum of its proper divisors (42539303223465).

51204666640215 is a wasteful number, since it uses less digits than its factorization.

51204666640215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178453992.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 51204666640215 in words is "fifty-one trillion, two hundred four billion, six hundred sixty-six million, six hundred forty thousand, two hundred fifteen".