51345220260615 has 16 divisors (see below), whose sum is σ = 82448931313248. Its totient is φ = 27285257840256.

The previous prime is 51345220260589. The next prime is 51345220260619. The reversal of 51345220260615 is 51606202254315.

It is not a de Polignac number, because 51345220260615 - 2⁸ = 51345220260359 is a prime.

It is a super-2 number, since 2×51345220260615² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51345220260619) 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, 6178722712 + ... + 6178731021.

It is an arithmetic number, because the mean of its divisors is an integer number (5153058207078).

Almost surely, 2^{51345220260615} is an apocalyptic number.

51345220260615 is a deficient number, since it is larger than the sum of its proper divisors (31103711052633).

51345220260615 is a wasteful number, since it uses less digits than its factorization.

51345220260615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12357454018.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 51345220260615 in words is "fifty-one trillion, three hundred forty-five billion, two hundred twenty million, two hundred sixty thousand, six hundred fifteen".