26670949644 has 12 divisors (see below), whose sum is σ = 62232215864. Its totient is φ = 8890316544.

The previous prime is 26670949631. The next prime is 26670949673. The reversal of 26670949644 is 44694907662.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×26670949644² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111289557 + ... + 1111289580.

Almost surely, 2^26670949644 is an apocalyptic number.

It is an amenable number.

26670949644 is an abundant number, since it is smaller than the sum of its proper divisors (35561266220).

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

26670949644 is a wasteful number, since it uses less digits than its factorization.

26670949644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222579144 (or 2222579142 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 57.

The spelling of 26670949644 in words is "twenty-six billion, six hundred seventy million, nine hundred forty-nine thousand, six hundred forty-four".