1612021716 has 48 divisors (see below), whose sum is σ = 4185148800. Its totient is φ = 536590656.

The previous prime is 1612021699. The next prime is 1612021717. The reversal of 1612021716 is 6171202161.

It is a happy number.

It is a super-2 number, since 2×1612021716² = 5197228025711169312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1612021716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612021717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70200 + ... + 90288.

It is an arithmetic number, because the mean of its divisors is an integer number (87190600).

Almost surely, 2^1612021716 is an apocalyptic number.

It is an amenable number.

1612021716 is an abundant number, since it is smaller than the sum of its proper divisors (2573127084).

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

1612021716 is a wasteful number, since it uses less digits than its factorization.

1612021716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20845 (or 20837 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1612021716 is about 40149.9902366115. The cubic root of 1612021716 is about 1172.5290984666.

Adding to 1612021716 its reverse (6171202161), we get a palindrome (7783223877).

The spelling of 1612021716 in words is "one billion, six hundred twelve million, twenty-one thousand, seven hundred sixteen".