26623999993 has 2 divisors, whose sum is σ = 26623999994. Its totient is φ = 26623999992.

The previous prime is 26623999951. The next prime is 26624000003. The reversal of 26623999993 is 39999932662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26040922384 + 583077609 = 161372^2 + 24147^2 .

It is a cyclic number.

It is not a de Polignac number, because 26623999993 - 2²¹ = 26621902841 is a prime.

It is not a weakly prime, because it can be changed into another prime (26623999093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13311999996 + 13311999997.

It is an arithmetic number, because the mean of its divisors is an integer number (13311999997).

Almost surely, 2^26623999993 is an apocalyptic number.

It is an amenable number.

26623999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

26623999993 is an equidigital number, since it uses as much as digits as its factorization.

26623999993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76527504, while the sum is 67.

The spelling of 26623999993 in words is "twenty-six billion, six hundred twenty-three million, nine hundred ninety-nine thousand, nine hundred ninety-three".