26971271640 has 96 divisors (see below), whose sum is σ = 88712835120. Its totient is φ = 7105676544.

The previous prime is 26971271627. The next prime is 26971271669. The reversal of 26971271640 is 4617217962.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421447 + ... + 481206.

Almost surely, 2^26971271640 is an apocalyptic number.

26971271640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26971271640 is an abundant number, since it is smaller than the sum of its proper divisors (61741563480).

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

26971271640 is a wasteful number, since it uses less digits than its factorization.

26971271640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902753 (or 902746 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 26971271640 in words is "twenty-six billion, nine hundred seventy-one million, two hundred seventy-one thousand, six hundred forty".