26643140670 has 16 divisors (see below), whose sum is σ = 63943537680. Its totient is φ = 7104837504.

The previous prime is 26643140663. The next prime is 26643140677. The reversal of 26643140670 is 7604134662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26643140663) and next prime (26643140677).

It is a super-2 number, since 2×26643140670² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26643140677) 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, 444052315 + ... + 444052374.

It is an arithmetic number, because the mean of its divisors is an integer number (3996471105).

Almost surely, 2^26643140670 is an apocalyptic number.

26643140670 is an abundant number, since it is smaller than the sum of its proper divisors (37300397010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26643140670 is a wasteful number, since it uses less digits than its factorization.

26643140670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888104699.

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 26643140670 in words is "twenty-six billion, six hundred forty-three million, one hundred forty thousand, six hundred seventy".