61452505447 has 2 divisors, whose sum is σ = 61452505448. Its totient is φ = 61452505446.

The previous prime is 61452505427. The next prime is 61452505453. The reversal of 61452505447 is 74450525416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61452505447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61452505427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30726252723 + 30726252724.

It is an arithmetic number, because the mean of its divisors is an integer number (30726252724).

Almost surely, 2^61452505447 is an apocalyptic number.

61452505447 is a deficient number, since it is larger than the sum of its proper divisors (1).

61452505447 is an equidigital number, since it uses as much as digits as its factorization.

61452505447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672000, while the sum is 43.

The spelling of 61452505447 in words is "sixty-one billion, four hundred fifty-two million, five hundred five thousand, four hundred forty-seven".