65515112077 has 2 divisors, whose sum is σ = 65515112078. Its totient is φ = 65515112076.

The previous prime is 65515112021. The next prime is 65515112081. The reversal of 65515112077 is 77021151556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62610548841 + 2904563236 = 250221^2 + 53894^2 .

It is a cyclic number.

It is not a de Polignac number, because 65515112077 - 2¹¹ = 65515110029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65515112087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32757556038 + 32757556039.

It is an arithmetic number, because the mean of its divisors is an integer number (32757556039).

Almost surely, 2^65515112077 is an apocalyptic number.

It is an amenable number.

65515112077 is a deficient number, since it is larger than the sum of its proper divisors (1).

65515112077 is an equidigital number, since it uses as much as digits as its factorization.

65515112077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 65515112077 in words is "sixty-five billion, five hundred fifteen million, one hundred twelve thousand, seventy-seven".