2661107950548 has 144 divisors (see below), whose sum is σ = 7293224131200. Its totient is φ = 838934236800.

The previous prime is 2661107950531. The next prime is 2661107950577. The reversal of 2661107950548 is 8450597011662.

It is a happy number.

2661107950548 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 1 + 0 + 7 + 95 + 0 + 548 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 2661107950494 and 2661107950503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4823073 + ... + 5346423.

It is an arithmetic number, because the mean of its divisors is an integer number (50647389800).

Almost surely, 2^{2661107950548} 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 2661107950548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3646612065600).

2661107950548 is an abundant number, since it is smaller than the sum of its proper divisors (4632116180652).

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

2661107950548 is a wasteful number, since it uses less digits than its factorization.

2661107950548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523499 (or 523468 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 2661107950548 in words is "two trillion, six hundred sixty-one billion, one hundred seven million, nine hundred fifty thousand, five hundred forty-eight".