51651615610013 has 16 divisors (see below), whose sum is σ = 52684883177472. Its totient is φ = 50626875600000.

The previous prime is 51651615609973. The next prime is 51651615610019. The reversal of 51651615610013 is 31001651615615.

It is a cyclic number.

It is not a de Polignac number, because 51651615610013 - 2¹² = 51651615605917 is a prime.

It is a super-2 number, since 2×51651615610013² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651615610019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233278628 + ... + 233499938.

It is an arithmetic number, because the mean of its divisors is an integer number (3292805198592).

Almost surely, 2^{51651615610013} is an apocalyptic number.

It is an amenable number.

51651615610013 is a deficient number, since it is larger than the sum of its proper divisors (1033267567459).

51651615610013 is a wasteful number, since it uses less digits than its factorization.

51651615610013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240556.

The product of its (nonzero) digits is 81000, while the sum is 41.

The spelling of 51651615610013 in words is "fifty-one trillion, six hundred fifty-one billion, six hundred fifteen million, six hundred ten thousand, thirteen".