26989661904 has 20 divisors (see below), whose sum is σ = 69723293376. Its totient is φ = 8996553952.

The previous prime is 26989661879. The next prime is 26989661929. The reversal of 26989661904 is 40916698962.

It is an interprime number because it is at equal distance from previous prime (26989661879) and next prime (26989661929).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281142264 + ... + 281142359.

Almost surely, 2^26989661904 is an apocalyptic number.

26989661904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26989661904 is an abundant number, since it is smaller than the sum of its proper divisors (42733631472).

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

26989661904 is a wasteful number, since it uses less digits than its factorization.

26989661904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562284634 (or 562284628 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 60.

The spelling of 26989661904 in words is "twenty-six billion, nine hundred eighty-nine million, six hundred sixty-one thousand, nine hundred four".