61500416447 has 2 divisors, whose sum is σ = 61500416448. Its totient is φ = 61500416446.

The previous prime is 61500416441. The next prime is 61500416521. The reversal of 61500416447 is 74461400516.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61500416447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61500416447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61500416441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750208223 + 30750208224.

It is an arithmetic number, because the mean of its divisors is an integer number (30750208224).

Almost surely, 2^61500416447 is an apocalyptic number.

61500416447 is a deficient number, since it is larger than the sum of its proper divisors (1).

61500416447 is an equidigital number, since it uses as much as digits as its factorization.

61500416447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 61500416447 in words is "sixty-one billion, five hundred million, four hundred sixteen thousand, four hundred forty-seven".