51957446389 has 2 divisors, whose sum is σ = 51957446390. Its totient is φ = 51957446388.

The previous prime is 51957446371. The next prime is 51957446441. The reversal of 51957446389 is 98364475915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43459740900 + 8497705489 = 208470^2 + 92183^2 .

It is a cyclic number.

It is not a de Polignac number, because 51957446389 - 2⁹ = 51957445877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51957446329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25978723194 + 25978723195.

It is an arithmetic number, because the mean of its divisors is an integer number (25978723195).

Almost surely, 2^51957446389 is an apocalyptic number.

It is an amenable number.

51957446389 is a deficient number, since it is larger than the sum of its proper divisors (1).

51957446389 is an equidigital number, since it uses as much as digits as its factorization.

51957446389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32659200, while the sum is 61.

The spelling of 51957446389 in words is "fifty-one billion, nine hundred fifty-seven million, four hundred forty-six thousand, three hundred eighty-nine".