1611021885120 has 168 divisors, whose sum is σ = 5635164010320. Its totient is φ = 422324336640.

The previous prime is 1611021885107. The next prime is 1611021885149. The reversal of 1611021885120 is 215881201161.

1611021885120 is a `hidden beast` number, since 1 + 6 + 110 + 21 + 8 + 8 + 512 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 4570611 + ... + 4910450.

Almost surely, 2^{1611021885120} is an apocalyptic number.

1611021885120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1611021885120 is an abundant number, since it is smaller than the sum of its proper divisors (4024142125200).

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

1611021885120 is a wasteful number, since it uses less digits than its factorization.

1611021885120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481143 (or 9481130 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 36.

The spelling of 1611021885120 in words is "one trillion, six hundred eleven billion, twenty-one million, eight hundred eighty-five thousand, one hundred twenty".