26390513990 has 32 divisors (see below), whose sum is σ = 47721623040. Its totient is φ = 10507660000.

The previous prime is 26390513983. The next prime is 26390514001. The reversal of 26390513990 is 9931509362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7827005 + ... + 7830375.

It is an arithmetic number, because the mean of its divisors is an integer number (1491300720).

Almost surely, 2^26390513990 is an apocalyptic number.

26390513990 is a deficient number, since it is larger than the sum of its proper divisors (21331109050).

26390513990 is a wasteful number, since it uses less digits than its factorization.

26390513990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6748.

The product of its (nonzero) digits is 393660, while the sum is 47.

The spelling of 26390513990 in words is "twenty-six billion, three hundred ninety million, five hundred thirteen thousand, nine hundred ninety".