26521893987 has 8 divisors (see below), whose sum is σ = 37442673936. Its totient is φ = 16641188352.

The previous prime is 26521893973. The next prime is 26521893989. The reversal of 26521893987 is 78939812562.

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

It is not a de Polignac number, because 26521893987 - 2⁴ = 26521893971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26521893987.

It is not an unprimeable number, because it can be changed into a prime (26521893989) 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, 260018518 + ... + 260018619.

It is an arithmetic number, because the mean of its divisors is an integer number (4680334242).

Almost surely, 2^26521893987 is an apocalyptic number.

26521893987 is a deficient number, since it is larger than the sum of its proper divisors (10920779949).

26521893987 is a wasteful number, since it uses less digits than its factorization.

26521893987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520037157.

The product of its digits is 13063680, while the sum is 60.

The spelling of 26521893987 in words is "twenty-six billion, five hundred twenty-one million, eight hundred ninety-three thousand, nine hundred eighty-seven".