61540074823 has 2 divisors, whose sum is σ = 61540074824. Its totient is φ = 61540074822.

The previous prime is 61540074809. The next prime is 61540074859. The reversal of 61540074823 is 32847004516.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61540074823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61540374823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30770037411 + 30770037412.

It is an arithmetic number, because the mean of its divisors is an integer number (30770037412).

Almost surely, 2^61540074823 is an apocalyptic number.

61540074823 is a deficient number, since it is larger than the sum of its proper divisors (1).

61540074823 is an equidigital number, since it uses as much as digits as its factorization.

61540074823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 61540074823 in words is "sixty-one billion, five hundred forty million, seventy-four thousand, eight hundred twenty-three".