26467447997 has 2 divisors, whose sum is σ = 26467447998. Its totient is φ = 26467447996.

The previous prime is 26467447969. The next prime is 26467448023. The reversal of 26467447997 is 79974476462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15262378681 + 11205069316 = 123541^2 + 105854^2 .

It is a cyclic number.

It is not a de Polignac number, because 26467447997 - 2³⁴ = 9287578813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26467447957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13233723998 + 13233723999.

It is an arithmetic number, because the mean of its divisors is an integer number (13233723999).

Almost surely, 2^26467447997 is an apocalyptic number.

It is an amenable number.

26467447997 is a deficient number, since it is larger than the sum of its proper divisors (1).

26467447997 is an equidigital number, since it uses as much as digits as its factorization.

26467447997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 65.

The spelling of 26467447997 in words is "twenty-six billion, four hundred sixty-seven million, four hundred forty-seven thousand, nine hundred ninety-seven".