24621307649 has 2 divisors, whose sum is σ = 24621307650. Its totient is φ = 24621307648.

The previous prime is 24621307637. The next prime is 24621307673. The reversal of 24621307649 is 94670312642.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22780468624 + 1840839025 = 150932^2 + 42905^2 .

It is a cyclic number.

It is not a de Polignac number, because 24621307649 - 2²⁰ = 24620259073 is a prime.

It is not a weakly prime, because it can be changed into another prime (24621307699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12310653824 + 12310653825.

It is an arithmetic number, because the mean of its divisors is an integer number (12310653825).

Almost surely, 2^24621307649 is an apocalyptic number.

It is an amenable number.

24621307649 is a deficient number, since it is larger than the sum of its proper divisors (1).

24621307649 is an equidigital number, since it uses as much as digits as its factorization.

24621307649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 24621307649 in words is "twenty-four billion, six hundred twenty-one million, three hundred seven thousand, six hundred forty-nine".