26987175487 has 4 divisors (see below), whose sum is σ = 28574656416. Its totient is φ = 25399694560.

The previous prime is 26987175469. The next prime is 26987175491. The reversal of 26987175487 is 78457178962.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-26987175487 is a prime.

It is a super-2 number, since 2×26987175487² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26987175437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793740439 + ... + 793740472.

It is an arithmetic number, because the mean of its divisors is an integer number (7143664104).

Almost surely, 2^26987175487 is an apocalyptic number.

26987175487 is a deficient number, since it is larger than the sum of its proper divisors (1587480929).

26987175487 is a wasteful number, since it uses less digits than its factorization.

26987175487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587480928.

The product of its digits is 47416320, while the sum is 64.

The spelling of 26987175487 in words is "twenty-six billion, nine hundred eighty-seven million, one hundred seventy-five thousand, four hundred eighty-seven".