1616625789156 has 135 divisors (see below), whose sum is σ = 4916654810067. Its totient is φ = 461847309840.

The previous prime is 1616625789151. The next prime is 1616625789161. The reversal of 1616625789156 is 6519875266161.

The square root of 1616625789156 is 1271466.

It is a perfect power (a square), and thus also a powerful number.

1616625789156 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 6 + 2 + 578 + 9 + 1 + 56 = 666.

It is an interprime number because it is at equal distance from previous prime (1616625789151) and next prime (1616625789161).

It is a super-2 number, since 2×1616625789156² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 1616625789093 and 1616625789102.

It is not an unprimeable number, because it can be changed into a prime (1616625789151) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 160199671 + ... + 160209761.

Almost surely, 2^{1616625789156} is an apocalyptic number.

1616625789156 is the 1271466-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1616625789156

1616625789156 is an abundant number, since it is smaller than the sum of its proper divisors (3300029020911).

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

1616625789156 is an frugal number, since it uses more digits than its factorization.

1616625789156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20212 (or 10103 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 1616625789156 in words is "one trillion, six hundred sixteen billion, six hundred twenty-five million, seven hundred eighty-nine thousand, one hundred fifty-six".