18233391279601 has 2 divisors, whose sum is σ = 18233391279602. Its totient is φ = 18233391279600.

The previous prime is 18233391279583. The next prime is 18233391279613. The reversal of 18233391279601 is 10697219333281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15783743711376 + 2449647568225 = 3972876^2 + 1565135^2 .

It is a cyclic number.

It is not a de Polignac number, because 18233391279601 - 2⁷ = 18233391279473 is a prime.

It is not a weakly prime, because it can be changed into another prime (18233391279641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9116695639800 + 9116695639801.

It is an arithmetic number, because the mean of its divisors is an integer number (9116695639801).

Almost surely, 2^{18233391279601} is an apocalyptic number.

It is an amenable number.

18233391279601 is a deficient number, since it is larger than the sum of its proper divisors (1).

18233391279601 is an equidigital number, since it uses as much as digits as its factorization.

18233391279601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 18233391279601 in words is "eighteen trillion, two hundred thirty-three billion, three hundred ninety-one million, two hundred seventy-nine thousand, six hundred one".