26802257947257 has 8 divisors (see below), whose sum is σ = 38485293462784. Its totient is φ = 16493697198288.

The previous prime is 26802257947219. The next prime is 26802257947291. The reversal of 26802257947257 is 75274975220862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26802257947257 - 2¹² = 26802257943161 is a prime.

It is a super-2 number, since 2×26802257947257² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26802257947217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343618691593 + ... + 343618691670.

It is an arithmetic number, because the mean of its divisors is an integer number (4810661682848).

Almost surely, 2^{26802257947257} is an apocalyptic number.

It is an amenable number.

26802257947257 is a deficient number, since it is larger than the sum of its proper divisors (11683035515527).

26802257947257 is a wasteful number, since it uses less digits than its factorization.

26802257947257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687237383279.

The product of its (nonzero) digits is 237081600, while the sum is 66.

The spelling of 26802257947257 in words is "twenty-six trillion, eight hundred two billion, two hundred fifty-seven million, nine hundred forty-seven thousand, two hundred fifty-seven".