26402387687 has 4 divisors (see below), whose sum is σ = 28433340600. Its totient is φ = 24371434776.

The previous prime is 26402387651. The next prime is 26402387729. The reversal of 26402387687 is 78678320462.

It is a happy number.

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

It is not a de Polignac number, because 26402387687 - 2⁶ = 26402387623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26402389687) 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, 1015476437 + ... + 1015476462.

It is an arithmetic number, because the mean of its divisors is an integer number (7108335150).

Almost surely, 2^26402387687 is an apocalyptic number.

26402387687 is a deficient number, since it is larger than the sum of its proper divisors (2030952913).

26402387687 is a wasteful number, since it uses less digits than its factorization.

26402387687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030952912.

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 26402387687 in words is "twenty-six billion, four hundred two million, three hundred eighty-seven thousand, six hundred eighty-seven".