26457664357 has 2 divisors, whose sum is σ = 26457664358. Its totient is φ = 26457664356.

The previous prime is 26457664339. The next prime is 26457664381. The reversal of 26457664357 is 75346675462.

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., 26451444321 + 6220036 = 162639^2 + 2494^2 .

It is a cyclic number.

It is not a de Polignac number, because 26457664357 - 2³¹ = 24310180709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26457664298 and 26457664307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26457664307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13228832178 + 13228832179.

It is an arithmetic number, because the mean of its divisors is an integer number (13228832179).

Almost surely, 2^26457664357 is an apocalyptic number.

It is an amenable number.

26457664357 is a deficient number, since it is larger than the sum of its proper divisors (1).

26457664357 is an equidigital number, since it uses as much as digits as its factorization.

26457664357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25401600, while the sum is 55.

The spelling of 26457664357 in words is "twenty-six billion, four hundred fifty-seven million, six hundred sixty-four thousand, three hundred fifty-seven".