80635649 has 2 divisors, whose sum is σ = 80635650. Its totient is φ = 80635648.

The previous prime is 80635627. The next prime is 80635669. The reversal of 80635649 is 94653608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47169424 + 33466225 = 6868^2 + 5785^2 .

It is a cyclic number.

It is not a de Polignac number, because 80635649 - 2¹² = 80631553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80635669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40317824 + 40317825.

It is an arithmetic number, because the mean of its divisors is an integer number (40317825).

Almost surely, 2^80635649 is an apocalyptic number.

It is an amenable number.

80635649 is a deficient number, since it is larger than the sum of its proper divisors (1).

80635649 is an equidigital number, since it uses as much as digits as its factorization.

80635649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 80635649 is about 8979.7354638096. The cubic root of 80635649 is about 432.0251489274.

The spelling of 80635649 in words is "eighty million, six hundred thirty-five thousand, six hundred forty-nine".