61400043499 has 2 divisors, whose sum is σ = 61400043500. Its totient is φ = 61400043498.

The previous prime is 61400043487. The next prime is 61400043559. The reversal of 61400043499 is 99434000416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61400043499 - 2⁹ = 61400042987 is a prime.

It is not a weakly prime, because it can be changed into another prime (61400043469) 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, 30700021749 + 30700021750.

It is an arithmetic number, because the mean of its divisors is an integer number (30700021750).

Almost surely, 2^61400043499 is an apocalyptic number.

61400043499 is a deficient number, since it is larger than the sum of its proper divisors (1).

61400043499 is an equidigital number, since it uses as much as digits as its factorization.

61400043499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 61400043499 in words is "sixty-one billion, four hundred million, forty-three thousand, four hundred ninety-nine".