1616299886778 has 24 divisors (see below), whose sum is σ = 3313366713024. Its totient is φ = 525625976160.

The previous prime is 1616299886753. The next prime is 1616299886779. The reversal of 1616299886778 is 8776889926161.

It is a happy number.

It is a super-2 number, since 2×1616299886778² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616299886779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80115826 + ... + 80135997.

It is an arithmetic number, because the mean of its divisors is an integer number (138056946376).

Almost surely, 2^{1616299886778} is an apocalyptic number.

1616299886778 is an abundant number, since it is smaller than the sum of its proper divisors (1697066826246).

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

1616299886778 is a wasteful number, since it uses less digits than its factorization.

1616299886778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160251910 (or 160251869 counting only the distinct ones).

The product of its digits is 877879296, while the sum is 78.

The spelling of 1616299886778 in words is "one trillion, six hundred sixteen billion, two hundred ninety-nine million, eight hundred eighty-six thousand, seven hundred seventy-eight".