61631240459 has 2 divisors, whose sum is σ = 61631240460. Its totient is φ = 61631240458.

The previous prime is 61631240393. The next prime is 61631240497. The reversal of 61631240459 is 95404213616.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61631240459 is a prime.

It is a super-3 number, since 3×61631240459³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (61631242459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30815620229 + 30815620230.

It is an arithmetic number, because the mean of its divisors is an integer number (30815620230).

Almost surely, 2^61631240459 is an apocalyptic number.

61631240459 is a deficient number, since it is larger than the sum of its proper divisors (1).

61631240459 is an equidigital number, since it uses as much as digits as its factorization.

61631240459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 61631240459 in words is "sixty-one billion, six hundred thirty-one million, two hundred forty thousand, four hundred fifty-nine".