1867616772428 has 96 divisors (see below), whose sum is σ = 3808765255680. Its totient is φ = 792754079040.

The previous prime is 1867616772421. The next prime is 1867616772443. The reversal of 1867616772428 is 8242776167681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1867616772421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106474883 + ... + 106492421.

It is an arithmetic number, because the mean of its divisors is an integer number (39674638080).

Almost surely, 2^{1867616772428} is an apocalyptic number.

It is an amenable number.

1867616772428 is an abundant number, since it is smaller than the sum of its proper divisors (1941148483252).

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

1867616772428 is a wasteful number, since it uses less digits than its factorization.

1867616772428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20067 (or 20065 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 65.

The spelling of 1867616772428 in words is "one trillion, eight hundred sixty-seven billion, six hundred sixteen million, seven hundred seventy-two thousand, four hundred twenty-eight".