61240734439 has 2 divisors, whose sum is σ = 61240734440. Its totient is φ = 61240734438.

The previous prime is 61240734413. The next prime is 61240734479. The reversal of 61240734439 is 93443704216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61240734439 - 2²³ = 61232345831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61240734395 and 61240734404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61240734479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30620367219 + 30620367220.

It is an arithmetic number, because the mean of its divisors is an integer number (30620367220).

Almost surely, 2^61240734439 is an apocalyptic number.

61240734439 is a deficient number, since it is larger than the sum of its proper divisors (1).

61240734439 is an equidigital number, since it uses as much as digits as its factorization.

61240734439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 61240734439 in words is "sixty-one billion, two hundred forty million, seven hundred thirty-four thousand, four hundred thirty-nine".