1616620126320 has 240 divisors, whose sum is σ = 5465864162304. Its totient is φ = 428193216000.

The previous prime is 1616620126301. The next prime is 1616620126321. The reversal of 1616620126320 is 236210266161.

1616620126320 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 6 + 2 + 0 + 12 + 632 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×1616620126320² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616620126321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64572205 + ... + 64597235.

Almost surely, 2^{1616620126320} is an apocalyptic number.

1616620126320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1616620126320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2732932081152).

1616620126320 is an abundant number, since it is smaller than the sum of its proper divisors (3849244035984).

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

1616620126320 is a wasteful number, since it uses less digits than its factorization.

1616620126320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25652 (or 25643 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 1616620126320 in words is "one trillion, six hundred sixteen billion, six hundred twenty million, one hundred twenty-six thousand, three hundred twenty".