51603867278 has 4 divisors (see below), whose sum is σ = 77405800920. Its totient is φ = 25801933638.

The previous prime is 51603867241. The next prime is 51603867397. The reversal of 51603867278 is 87276830615.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12900966818 + ... + 12900966821.

It is an arithmetic number, because the mean of its divisors is an integer number (19351450230).

Almost surely, 2^51603867278 is an apocalyptic number.

51603867278 is a deficient number, since it is larger than the sum of its proper divisors (25801933642).

51603867278 is a wasteful number, since it uses less digits than its factorization.

51603867278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25801933641.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 51603867278 in words is "fifty-one billion, six hundred three million, eight hundred sixty-seven thousand, two hundred seventy-eight".