18061199407 has 2 divisors, whose sum is σ = 18061199408. Its totient is φ = 18061199406.

The previous prime is 18061199389. The next prime is 18061199503. The reversal of 18061199407 is 70499116081.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18061199407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18061119407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9030599703 + 9030599704.

It is an arithmetic number, because the mean of its divisors is an integer number (9030599704).

Almost surely, 2^18061199407 is an apocalyptic number.

18061199407 is a deficient number, since it is larger than the sum of its proper divisors (1).

18061199407 is an equidigital number, since it uses as much as digits as its factorization.

18061199407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 18061199407 in words is "eighteen billion, sixty-one million, one hundred ninety-nine thousand, four hundred seven".