2661543642150 has 192 divisors, whose sum is σ = 7627604659200. Its totient is φ = 681820364160.

The previous prime is 2661543642059. The next prime is 2661543642179. The reversal of 2661543642150 is 512463451662.

2661543642150 is a `hidden beast` number, since 2 + 6 + 61 + 5 + 436 + 4 + 2 + 150 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 2661543642096 and 2661543642105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3608809 + ... + 4283291.

It is an arithmetic number, because the mean of its divisors is an integer number (39727107600).

Almost surely, 2^{2661543642150} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661543642150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3813802329600).

2661543642150 is an abundant number, since it is smaller than the sum of its proper divisors (4966061017050).

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

2661543642150 is a wasteful number, since it uses less digits than its factorization.

2661543642150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674620 (or 674609 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 2661543642150 in words is "two trillion, six hundred sixty-one billion, five hundred forty-three million, six hundred forty-two thousand, one hundred fifty".