61347654691 has 2 divisors, whose sum is σ = 61347654692. Its totient is φ = 61347654690.

The previous prime is 61347654671. The next prime is 61347654763. The reversal of 61347654691 is 19645674316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61347654691 - 2¹³ = 61347646499 is a prime.

It is not a weakly prime, because it can be changed into another prime (61347654671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30673827345 + 30673827346.

It is an arithmetic number, because the mean of its divisors is an integer number (30673827346).

Almost surely, 2^61347654691 is an apocalyptic number.

61347654691 is a deficient number, since it is larger than the sum of its proper divisors (1).

61347654691 is an equidigital number, since it uses as much as digits as its factorization.

61347654691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 52.

The spelling of 61347654691 in words is "sixty-one billion, three hundred forty-seven million, six hundred fifty-four thousand, six hundred ninety-one".