61400042999 has 2 divisors, whose sum is σ = 61400043000. Its totient is φ = 61400042998.

The previous prime is 61400042993. The next prime is 61400043007. The reversal of 61400042999 is 99924000416.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61400042999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61400042993) 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, 30700021499 + 30700021500.

It is an arithmetic number, because the mean of its divisors is an integer number (30700021500).

Almost surely, 2^61400042999 is an apocalyptic number.

61400042999 is a deficient number, since it is larger than the sum of its proper divisors (1).

61400042999 is an equidigital number, since it uses as much as digits as its factorization.

61400042999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 61400042999 in words is "sixty-one billion, four hundred million, forty-two thousand, nine hundred ninety-nine".