1616360216578 has 4 divisors (see below), whose sum is σ = 2424540324870. Its totient is φ = 808180108288.

The previous prime is 1616360216543. The next prime is 1616360216579. The reversal of 1616360216578 is 8756120636161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1377705495049 + 238654721529 = 1173757^2 + 488523^2 .

It is a super-2 number, since 2×1616360216578² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616360216579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404090054143 + ... + 404090054146.

Almost surely, 2^{1616360216578} is an apocalyptic number.

1616360216578 is a deficient number, since it is larger than the sum of its proper divisors (808180108292).

1616360216578 is an equidigital number, since it uses as much as digits as its factorization.

1616360216578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808180108291.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 1616360216578 in words is "one trillion, six hundred sixteen billion, three hundred sixty million, two hundred sixteen thousand, five hundred seventy-eight".