2653661489616 has 240 divisors, whose sum is σ = 7755149495808. Its totient is φ = 846132019200.

The previous prime is 2653661489561. The next prime is 2653661489623. The reversal of 2653661489616 is 6169841663562.

2653661489616 is a `hidden beast` number, since 2 + 6 + 5 + 3 + 6 + 6 + 1 + 4 + 8 + 9 + 616 = 666.

2653661489616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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, 150280660 + ... + 150298316.

Almost surely, 2^{2653661489616} 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 2653661489616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3877574747904).

2653661489616 is an abundant number, since it is smaller than the sum of its proper divisors (5101488006192).

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

2653661489616 is a wasteful number, since it uses less digits than its factorization.

2653661489616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18090 (or 18081 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 63.

The spelling of 2653661489616 in words is "two trillion, six hundred fifty-three billion, six hundred sixty-one million, four hundred eighty-nine thousand, six hundred sixteen".