51656060015 has 16 divisors (see below), whose sum is σ = 70853533248. Its totient is φ = 35415830016.

The previous prime is 51656059991. The next prime is 51656060017. The reversal of 51656060015 is 51006065615.

It is not a de Polignac number, because 51656060015 - 2¹⁴ = 51656043631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51656060017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122969 + ... + 344141.

It is an arithmetic number, because the mean of its divisors is an integer number (4428345828).

Almost surely, 2^51656060015 is an apocalyptic number.

51656060015 is a deficient number, since it is larger than the sum of its proper divisors (19197473233).

51656060015 is a wasteful number, since it uses less digits than its factorization.

51656060015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227858.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 51656060015 in words is "fifty-one billion, six hundred fifty-six million, sixty thousand, fifteen".