5165123878 has 4 divisors (see below), whose sum is σ = 7747685820. Its totient is φ = 2582561938.

The previous prime is 5165123863. The next prime is 5165123903. The reversal of 5165123878 is 8783215615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8783215615 = 5 ⋅1756643123.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1291280968 + ... + 1291280971.

It is an arithmetic number, because the mean of its divisors is an integer number (1936921455).

Almost surely, 2^5165123878 is an apocalyptic number.

5165123878 is a deficient number, since it is larger than the sum of its proper divisors (2582561942).

5165123878 is a wasteful number, since it uses less digits than its factorization.

5165123878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582561941.

The product of its digits is 403200, while the sum is 46.

The square root of 5165123878 is about 71868.7962748786. The cubic root of 5165123878 is about 1728.5963062155.

The spelling of 5165123878 in words is "five billion, one hundred sixty-five million, one hundred twenty-three thousand, eight hundred seventy-eight".