1616354361220 has 12 divisors (see below), whose sum is σ = 3394344158604. Its totient is φ = 646541744480.

The previous prime is 1616354361217. The next prime is 1616354361263. The reversal of 1616354361220 is 221634536161.

It can be written as a sum of positive squares in 2 ways, for example, as 1175333520384 + 441020840836 = 1084128^2 + 664094^2 .

It is a super-2 number, since 2×1616354361220² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40408859011 + ... + 40408859050.

It is an arithmetic number, because the mean of its divisors is an integer number (282862013217).

Almost surely, 2^{1616354361220} is an apocalyptic number.

1616354361220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616354361220 is an abundant number, since it is smaller than the sum of its proper divisors (1777989797384).

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

1616354361220 is a wasteful number, since it uses less digits than its factorization.

1616354361220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80817718070 (or 80817718068 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 1616354361220 its reverse (221634536161), we get a palindrome (1837988897381).

The spelling of 1616354361220 in words is "one trillion, six hundred sixteen billion, three hundred fifty-four million, three hundred sixty-one thousand, two hundred twenty".