51113703418 has 4 divisors (see below), whose sum is σ = 76670555130. Its totient is φ = 25556851708.

The previous prime is 51113703379. The next prime is 51113703427. The reversal of 51113703418 is 81430731115.

It is a happy number.

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., 49405286529 + 1708416889 = 222273^2 + 41333^2 .

It is a super-3 number, since 3×51113703418³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778425853 + ... + 12778425856.

Almost surely, 2^51113703418 is an apocalyptic number.

51113703418 is a deficient number, since it is larger than the sum of its proper divisors (25556851712).

51113703418 is a wasteful number, since it uses less digits than its factorization.

51113703418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25556851711.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 51113703418 in words is "fifty-one billion, one hundred thirteen million, seven hundred three thousand, four hundred eighteen".