2600665111604 has 96 divisors (see below), whose sum is σ = 5375812108800. Its totient is φ = 1100279448576.

The previous prime is 2600665111601. The next prime is 2600665111637. The reversal of 2600665111604 is 4061115660062.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2600665111601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52809737 + ... + 52858959.

It is an arithmetic number, because the mean of its divisors is an integer number (55998042800).

Almost surely, 2^{2600665111604} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2600665111604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2687906054400).

2600665111604 is an abundant number, since it is smaller than the sum of its proper divisors (2775146997196).

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

2600665111604 is a wasteful number, since it uses less digits than its factorization.

2600665111604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49742 (or 49726 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 2600665111604 in words is "two trillion, six hundred billion, six hundred sixty-five million, one hundred eleven thousand, six hundred four".