51156352702061 has 4 divisors (see below), whose sum is σ = 51157054152252. Its totient is φ = 51155651251872.

The previous prime is 51156352702033. The next prime is 51156352702069. The reversal of 51156352702061 is 16020725365115.

51156352702061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42793446388900 + 8362906313161 = 6541670^2 + 2891869^2 .

It is a cyclic number.

It is not a de Polignac number, because 51156352702061 - 2²² = 51156348507757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51156352702069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350615690 + ... + 350761563.

It is an arithmetic number, because the mean of its divisors is an integer number (12789263538063).

Almost surely, 2^{51156352702061} is an apocalyptic number.

It is an amenable number.

51156352702061 is a deficient number, since it is larger than the sum of its proper divisors (701450191).

51156352702061 is an equidigital number, since it uses as much as digits as its factorization.

51156352702061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701450190.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 51156352702061 in words is "fifty-one trillion, one hundred fifty-six billion, three hundred fifty-two million, seven hundred two thousand, sixty-one".