51427354061 has 4 divisors (see below), whose sum is σ = 51489390300. Its totient is φ = 51365317824.

The previous prime is 51427354057. The next prime is 51427354129. The reversal of 51427354061 is 16045372415.

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 18606596836 + 32820757225 = 136406^2 + 181165^2 .

It is a cyclic number.

It is not a de Polignac number, because 51427354061 - 2² = 51427354057 is a prime.

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 (51427354021) 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, 31016876 + ... + 31018533.

It is an arithmetic number, because the mean of its divisors is an integer number (12872347575).

Almost surely, 2^51427354061 is an apocalyptic number.

It is an amenable number.

51427354061 is a deficient number, since it is larger than the sum of its proper divisors (62036239).

51427354061 is an equidigital number, since it uses as much as digits as its factorization.

51427354061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62036238.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 51427354061 in words is "fifty-one billion, four hundred twenty-seven million, three hundred fifty-four thousand, sixty-one".