61620505343 has 2 divisors, whose sum is σ = 61620505344. Its totient is φ = 61620505342.

The previous prime is 61620505339. The next prime is 61620505369. The reversal of 61620505343 is 34350502616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61620505343 - 2² = 61620505339 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61620505393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30810252671 + 30810252672.

It is an arithmetic number, because the mean of its divisors is an integer number (30810252672).

Almost surely, 2^61620505343 is an apocalyptic number.

61620505343 is a deficient number, since it is larger than the sum of its proper divisors (1).

61620505343 is an equidigital number, since it uses as much as digits as its factorization.

61620505343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 61620505343 in words is "sixty-one billion, six hundred twenty million, five hundred five thousand, three hundred forty-three".