1863623640678 has 16 divisors (see below), whose sum is σ = 3727359233136. Its totient is φ = 621189221600.

The previous prime is 1863623640551. The next prime is 1863623640691. The reversal of 1863623640678 is 8760463263681.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 4447473 + ... + 4848428.

It is an arithmetic number, because the mean of its divisors is an integer number (232959952071).

Almost surely, 2^{1863623640678} is an apocalyptic number.

1863623640678 is an abundant number, since it is smaller than the sum of its proper divisors (1863735592458).

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

1863623640678 is a wasteful number, since it uses less digits than its factorization.

1863623640678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9329319.

The product of its (nonzero) digits is 41803776, while the sum is 60.

The spelling of 1863623640678 in words is "one trillion, eight hundred sixty-three billion, six hundred twenty-three million, six hundred forty thousand, six hundred seventy-eight".