3561656042052 has 144 divisors (see below), whose sum is σ = 9772766640000. Its totient is φ = 1090315150848.

The previous prime is 3561656042039. The next prime is 3561656042101. The reversal of 3561656042052 is 2502406561653.

3561656042052 is a `hidden beast` number, since 3 + 5 + 6 + 16 + 5 + 604 + 20 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 3561656041989 and 3561656042007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3883824 + ... + 4712472.

It is an arithmetic number, because the mean of its divisors is an integer number (67866435000).

Almost surely, 2^{3561656042052} 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 3561656042052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4886383320000).

3561656042052 is an abundant number, since it is smaller than the sum of its proper divisors (6211110597948).

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

3561656042052 is a wasteful number, since it uses less digits than its factorization.

3561656042052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828890 (or 828885 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 3561656042052 in words is "three trillion, five hundred sixty-one billion, six hundred fifty-six million, forty-two thousand, fifty-two".