61381124447 has 2 divisors, whose sum is σ = 61381124448. Its totient is φ = 61381124446.

The previous prime is 61381124429. The next prime is 61381124503. The reversal of 61381124447 is 74442118316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61381124447 - 2⁸ = 61381124191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61381124347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30690562223 + 30690562224.

It is an arithmetic number, because the mean of its divisors is an integer number (30690562224).

Almost surely, 2^61381124447 is an apocalyptic number.

61381124447 is a deficient number, since it is larger than the sum of its proper divisors (1).

61381124447 is an equidigital number, since it uses as much as digits as its factorization.

61381124447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The spelling of 61381124447 in words is "sixty-one billion, three hundred eighty-one million, one hundred twenty-four thousand, four hundred forty-seven".