65072951557 has 2 divisors, whose sum is σ = 65072951558. Its totient is φ = 65072951556.

The previous prime is 65072951507. The next prime is 65072951569. The reversal of 65072951557 is 75515927056.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63773421156 + 1299530401 = 252534^2 + 36049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65072951557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65072951507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32536475778 + 32536475779.

It is an arithmetic number, because the mean of its divisors is an integer number (32536475779).

Almost surely, 2^65072951557 is an apocalyptic number.

It is an amenable number.

65072951557 is a deficient number, since it is larger than the sum of its proper divisors (1).

65072951557 is an equidigital number, since it uses as much as digits as its factorization.

65072951557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3307500, while the sum is 52.

The spelling of 65072951557 in words is "sixty-five billion, seventy-two million, nine hundred fifty-one thousand, five hundred fifty-seven".