266015011615644 has 12 divisors (see below), whose sum is σ = 620701693769864. Its totient is φ = 88671670538544.

The previous prime is 266015011615621. The next prime is 266015011615649. The reversal of 266015011615644 is 446516110510662.

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

It is a junction number, because it is equal to n+sod(n) for n = 266015011615593 and 266015011615602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266015011615649) 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, 11083958817307 + ... + 11083958817330.

Almost surely, 2^{266015011615644} is an apocalyptic number.

It is an amenable number.

266015011615644 is an abundant number, since it is smaller than the sum of its proper divisors (354686682154220).

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

266015011615644 is a wasteful number, since it uses less digits than its factorization.

266015011615644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22167917634644 (or 22167917634642 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 266015011615644 in words is "two hundred sixty-six trillion, fifteen billion, eleven million, six hundred fifteen thousand, six hundred forty-four".