61774006493 has 2 divisors, whose sum is σ = 61774006494. Its totient is φ = 61774006492.

The previous prime is 61774006477. The next prime is 61774006501. The reversal of 61774006493 is 39460047716.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37062795289 + 24711211204 = 192517^2 + 157198^2 .

It is a cyclic number.

It is not a de Polignac number, because 61774006493 - 2⁴ = 61774006477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61774006093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30887003246 + 30887003247.

It is an arithmetic number, because the mean of its divisors is an integer number (30887003247).

Almost surely, 2^61774006493 is an apocalyptic number.

It is an amenable number.

61774006493 is a deficient number, since it is larger than the sum of its proper divisors (1).

61774006493 is an equidigital number, since it uses as much as digits as its factorization.

61774006493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 61774006493 in words is "sixty-one billion, seven hundred seventy-four million, six thousand, four hundred ninety-three".