61648357 has 2 divisors, whose sum is σ = 61648358. Its totient is φ = 61648356.

The previous prime is 61648351. The next prime is 61648373. The reversal of 61648357 is 75384616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60699681 + 948676 = 7791^2 + 974^2 .

It is a cyclic number.

It is not a de Polignac number, because 61648357 - 2¹¹ = 61646309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61648351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30824178 + 30824179.

It is an arithmetic number, because the mean of its divisors is an integer number (30824179).

Almost surely, 2^61648357 is an apocalyptic number.

It is an amenable number.

61648357 is a deficient number, since it is larger than the sum of its proper divisors (1).

61648357 is an equidigital number, since it uses as much as digits as its factorization.

61648357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 61648357 is about 7851.6467699458. The cubic root of 61648357 is about 395.0394811789.

The spelling of 61648357 in words is "sixty-one million, six hundred forty-eight thousand, three hundred fifty-seven".