61525649 has 2 divisors, whose sum is σ = 61525650. Its totient is φ = 61525648.

The previous prime is 61525627. The next prime is 61525687. The reversal of 61525649 is 94652516.

It is an a-pointer prime, because the next prime (61525687) can be obtained adding 61525649 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50865424 + 10660225 = 7132^2 + 3265^2 .

It is a cyclic number.

It is not a de Polignac number, because 61525649 - 2²⁴ = 44748433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61525619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30762824 + 30762825.

It is an arithmetic number, because the mean of its divisors is an integer number (30762825).

Almost surely, 2^61525649 is an apocalyptic number.

It is an amenable number.

61525649 is a deficient number, since it is larger than the sum of its proper divisors (1).

61525649 is an equidigital number, since it uses as much as digits as its factorization.

61525649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 61525649 is about 7843.8287207205. The cubic root of 61525649 is about 394.7772049147. Note that the first 3 decimals are identical.

The spelling of 61525649 in words is "sixty-one million, five hundred twenty-five thousand, six hundred forty-nine".