51245557670441 has 2 divisors, whose sum is σ = 51245557670442. Its totient is φ = 51245557670440.

The previous prime is 51245557670381. The next prime is 51245557670471. The reversal of 51245557670441 is 14407675554215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46934830810000 + 4310726860441 = 6850900^2 + 2076229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51245557670441 is a prime.

It is a super-2 number, since 2×51245557670441² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51245557670471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25622778835220 + 25622778835221.

It is an arithmetic number, because the mean of its divisors is an integer number (25622778835221).

Almost surely, 2^{51245557670441} is an apocalyptic number.

It is an amenable number.

51245557670441 is a deficient number, since it is larger than the sum of its proper divisors (1).

51245557670441 is an equidigital number, since it uses as much as digits as its factorization.

51245557670441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520000, while the sum is 56.

The spelling of 51245557670441 in words is "fifty-one trillion, two hundred forty-five billion, five hundred fifty-seven million, six hundred seventy thousand, four hundred forty-one".