26611620055997 has 2 divisors, whose sum is σ = 26611620055998. Its totient is φ = 26611620055996.

The previous prime is 26611620055987. The next prime is 26611620056017. The reversal of 26611620055997 is 79955002611662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15296812720996 + 11314807335001 = 3911114^2 + 3363749^2 .

It is a cyclic number.

It is not a de Polignac number, because 26611620055997 - 2⁴ = 26611620055981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26611620055987) 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, 13305810027998 + 13305810027999.

It is an arithmetic number, because the mean of its divisors is an integer number (13305810027999).

Almost surely, 2^{26611620055997} is an apocalyptic number.

It is an amenable number.

26611620055997 is a deficient number, since it is larger than the sum of its proper divisors (1).

26611620055997 is an equidigital number, since it uses as much as digits as its factorization.

26611620055997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 26611620055997 in words is "twenty-six trillion, six hundred eleven billion, six hundred twenty million, fifty-five thousand, nine hundred ninety-seven".