61023178493 has 2 divisors, whose sum is σ = 61023178494. Its totient is φ = 61023178492.

The previous prime is 61023178439. The next prime is 61023178511. The reversal of 61023178493 is 39487132016.

Together with previous prime (61023178439) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54731198809 + 6291979684 = 233947^2 + 79322^2 .

It is a cyclic number.

It is not a de Polignac number, because 61023178493 - 2²⁴ = 61006401277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61023178093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30511589246 + 30511589247.

It is an arithmetic number, because the mean of its divisors is an integer number (30511589247).

Almost surely, 2^61023178493 is an apocalyptic number.

It is an amenable number.

61023178493 is a deficient number, since it is larger than the sum of its proper divisors (1).

61023178493 is an equidigital number, since it uses as much as digits as its factorization.

61023178493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 61023178493 in words is "sixty-one billion, twenty-three million, one hundred seventy-eight thousand, four hundred ninety-three".