51867876815 has 4 divisors (see below), whose sum is σ = 62241452184. Its totient is φ = 41494301448.

The previous prime is 51867876811. The next prime is 51867876839.

51867876815 is nontrivially palindromic in base 10.

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 51867876815 - 2² = 51867876811 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 (51867876811) 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, 5186787677 + ... + 5186787686.

It is an arithmetic number, because the mean of its divisors is an integer number (15560363046).

Almost surely, 2^51867876815 is an apocalyptic number.

51867876815 is a deficient number, since it is larger than the sum of its proper divisors (10373575369).

51867876815 is a wasteful number, since it uses less digits than its factorization.

51867876815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10373575368.

The product of its digits is 22579200, while the sum is 62.

The spelling of 51867876815 in words is "fifty-one billion, eight hundred sixty-seven million, eight hundred seventy-six thousand, eight hundred fifteen".