65019891037 has 2 divisors, whose sum is σ = 65019891038. Its totient is φ = 65019891036.

The previous prime is 65019891019. The next prime is 65019891043. The reversal of 65019891037 is 73019891056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36013032441 + 29006858596 = 189771^2 + 170314^2 .

It is a cyclic number.

It is not a de Polignac number, because 65019891037 - 2³⁵ = 30660152669 is a prime.

It is a super-3 number, since 3×65019891037³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65019891067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32509945518 + 32509945519.

It is an arithmetic number, because the mean of its divisors is an integer number (32509945519).

Almost surely, 2^65019891037 is an apocalyptic number.

It is an amenable number.

65019891037 is a deficient number, since it is larger than the sum of its proper divisors (1).

65019891037 is an equidigital number, since it uses as much as digits as its factorization.

65019891037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 65019891037 in words is "sixty-five billion, nineteen million, eight hundred ninety-one thousand, thirty-seven".