65016491 has 2 divisors, whose sum is σ = 65016492. Its totient is φ = 65016490.

The previous prime is 65016439. The next prime is 65016509. The reversal of 65016491 is 19461056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65016491 - 2²² = 60822187 is a prime.

It is not a weakly prime, because it can be changed into another prime (65016401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32508245 + 32508246.

It is an arithmetic number, because the mean of its divisors is an integer number (32508246).

Almost surely, 2^65016491 is an apocalyptic number.

65016491 is a deficient number, since it is larger than the sum of its proper divisors (1).

65016491 is an equidigital number, since it uses as much as digits as its factorization.

65016491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 65016491 is about 8063.2804118423. The cubic root of 65016491 is about 402.1065759522.

The spelling of 65016491 in words is "sixty-five million, sixteen thousand, four hundred ninety-one".