26149390890 has 64 divisors (see below), whose sum is σ = 71838074880. Its totient is φ = 5967501120.

The previous prime is 26149390859. The next prime is 26149390931. The reversal of 26149390890 is 9809394162.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33841 + ... + 231179.

It is an arithmetic number, because the mean of its divisors is an integer number (1122469920).

Almost surely, 2^26149390890 is an apocalyptic number.

26149390890 is an abundant number, since it is smaller than the sum of its proper divisors (45688683990).

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

26149390890 is a wasteful number, since it uses less digits than its factorization.

26149390890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197987.

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 26149390890 in words is "twenty-six billion, one hundred forty-nine million, three hundred ninety thousand, eight hundred ninety".