51117413507 has 4 divisors (see below), whose sum is σ = 51311776560. Its totient is φ = 50923050456.

The previous prime is 51117413491. The next prime is 51117413539. The reversal of 51117413507 is 70531471115.

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 51117413507 - 2⁴ = 51117413491 is a prime.

It is a super-2 number, since 2×51117413507² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51117413587) 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, 97181132 + ... + 97181657.

It is an arithmetic number, because the mean of its divisors is an integer number (12827944140).

Almost surely, 2^51117413507 is an apocalyptic number.

51117413507 is a deficient number, since it is larger than the sum of its proper divisors (194363053).

51117413507 is a wasteful number, since it uses less digits than its factorization.

51117413507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194363052.

The product of its (nonzero) digits is 14700, while the sum is 35.

The spelling of 51117413507 in words is "fifty-one billion, one hundred seventeen million, four hundred thirteen thousand, five hundred seven".