26616828457 has 2 divisors, whose sum is σ = 26616828458. Its totient is φ = 26616828456.

The previous prime is 26616828443. The next prime is 26616828479. The reversal of 26616828457 is 75482861662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17843883561 + 8772944896 = 133581^2 + 93664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26616828457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26616828398 and 26616828407.

It is not a weakly prime, because it can be changed into another prime (26616828157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13308414228 + 13308414229.

It is an arithmetic number, because the mean of its divisors is an integer number (13308414229).

Almost surely, 2^26616828457 is an apocalyptic number.

It is an amenable number.

26616828457 is a deficient number, since it is larger than the sum of its proper divisors (1).

26616828457 is an equidigital number, since it uses as much as digits as its factorization.

26616828457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 55.

The spelling of 26616828457 in words is "twenty-six billion, six hundred sixteen million, eight hundred twenty-eight thousand, four hundred fifty-seven".