610651649 has 2 divisors, whose sum is σ = 610651650. Its totient is φ = 610651648.

The previous prime is 610651631. The next prime is 610651651. The reversal of 610651649 is 946156016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544522225 + 66129424 = 23335^2 + 8132^2 .

It is a cyclic number.

It is not a de Polignac number, because 610651649 - 2¹² = 610647553 is a prime.

Together with 610651651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (610651619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305325824 + 305325825.

It is an arithmetic number, because the mean of its divisors is an integer number (305325825).

Almost surely, 2^610651649 is an apocalyptic number.

It is an amenable number.

610651649 is a deficient number, since it is larger than the sum of its proper divisors (1).

610651649 is an equidigital number, since it uses as much as digits as its factorization.

610651649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 610651649 is about 24711.3667974882. The cubic root of 610651649 is about 848.3945006628.

The spelling of 610651649 in words is "six hundred ten million, six hundred fifty-one thousand, six hundred forty-nine".