51505115006 has 4 divisors (see below), whose sum is σ = 77257672512. Its totient is φ = 25752557502.

The previous prime is 51505115003. The next prime is 51505115023. The reversal of 51505115006 is 60051150515.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60051150515 = 5 ⋅12010230103.

It is a self number, because there is not a number n which added to its sum of digits gives 51505115006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505115003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12876278750 + ... + 12876278753.

It is an arithmetic number, because the mean of its divisors is an integer number (19314418128).

Almost surely, 2^51505115006 is an apocalyptic number.

51505115006 is a deficient number, since it is larger than the sum of its proper divisors (25752557506).

51505115006 is a wasteful number, since it uses less digits than its factorization.

51505115006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25752557505.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 51505115006 in words is "fifty-one billion, five hundred five million, one hundred fifteen thousand, six".