61626449 has 2 divisors, whose sum is σ = 61626450. Its totient is φ = 61626448.

The previous prime is 61626437. The next prime is 61626469. The reversal of 61626449 is 94462616.

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., 61340224 + 286225 = 7832^2 + 535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61626449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61626469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30813224 + 30813225.

It is an arithmetic number, because the mean of its divisors is an integer number (30813225).

Almost surely, 2^61626449 is an apocalyptic number.

It is an amenable number.

61626449 is a deficient number, since it is larger than the sum of its proper divisors (1).

61626449 is an equidigital number, since it uses as much as digits as its factorization.

61626449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 61626449 is about 7850.2515246328. The cubic root of 61626449 is about 394.9926805245.

The spelling of 61626449 in words is "sixty-one million, six hundred twenty-six thousand, four hundred forty-nine".