61344497493 has 12 divisors (see below), whose sum is σ = 88836509580. Its totient is φ = 40791197376.

The previous prime is 61344497491. The next prime is 61344497519. The reversal of 61344497493 is 39479444316.

61344497493 is a `hidden beast` number, since 61 + 3 + 4 + 4 + 4 + 97 + 493 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40384117764 + 20960379729 = 200958^2 + 144777^2 .

It is not a de Polignac number, because 61344497493 - 2¹ = 61344497491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61344497491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8757496 + ... + 8764497.

It is an arithmetic number, because the mean of its divisors is an integer number (7403042465).

Almost surely, 2^61344497493 is an apocalyptic number.

It is an amenable number.

61344497493 is a deficient number, since it is larger than the sum of its proper divisors (27492012087).

61344497493 is a wasteful number, since it uses less digits than its factorization.

61344497493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17522388 (or 17522385 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 54.

The spelling of 61344497493 in words is "sixty-one billion, three hundred forty-four million, four hundred ninety-seven thousand, four hundred ninety-three".