1611632412720 has 160 divisors (see below), whose sum is σ = 6055830973440. Its totient is φ = 390698760960.

The previous prime is 1611632412713. The next prime is 1611632412781. The reversal of 1611632412720 is 272142361161.

1611632412720 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 632 + 4 + 12 + 7 + 2 + 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 31 ways as a sum of consecutive naturals, for example, 33891064 + ... + 33938583.

It is an arithmetic number, because the mean of its divisors is an integer number (37848943584).

Almost surely, 2^{1611632412720} is an apocalyptic number.

1611632412720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1611632412720 is an abundant number, since it is smaller than the sum of its proper divisors (4444198560720).

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

1611632412720 is a wasteful number, since it uses less digits than its factorization.

1611632412720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67829680 (or 67829668 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Adding to 1611632412720 its reverse (272142361161), we get a palindrome (1883774773881).

The spelling of 1611632412720 in words is "one trillion, six hundred eleven billion, six hundred thirty-two million, four hundred twelve thousand, seven hundred twenty".