51151364218 has 4 divisors (see below), whose sum is σ = 76727046330. Its totient is φ = 25575682108.

The previous prime is 51151364203. The next prime is 51151364221. The reversal of 51151364218 is 81246315115.

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

It can be written as a sum of positive squares in only one way, i.e., 26801946369 + 24349417849 = 163713^2 + 156043^2 .

It is a super-2 number, since 2×51151364218² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12787841053 + ... + 12787841056.

Almost surely, 2^51151364218 is an apocalyptic number.

51151364218 is a deficient number, since it is larger than the sum of its proper divisors (25575682112).

51151364218 is a wasteful number, since it uses less digits than its factorization.

51151364218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25575682111.

The product of its digits is 28800, while the sum is 37.

The spelling of 51151364218 in words is "fifty-one billion, one hundred fifty-one million, three hundred sixty-four thousand, two hundred eighteen".