1978672926383 has 8 divisors (see below), whose sum is σ = 2051880194208. Its totient is φ = 1906504059744.

The previous prime is 1978672926323. The next prime is 1978672926407. The reversal of 1978672926383 is 3836292768791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1978672926383 - 2¹⁸ = 1978672664239 is a prime.

It is a super-3 number, since 3×1978672926383³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978672926323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259596416 + ... + 259604037.

It is an arithmetic number, because the mean of its divisors is an integer number (256485024276).

Almost surely, 2^{1978672926383} is an apocalyptic number.

1978672926383 is a deficient number, since it is larger than the sum of its proper divisors (73207267825).

1978672926383 is a wasteful number, since it uses less digits than its factorization.

1978672926383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519200593.

The product of its digits is 329204736, while the sum is 71.

The spelling of 1978672926383 in words is "one trillion, nine hundred seventy-eight billion, six hundred seventy-two million, nine hundred twenty-six thousand, three hundred eighty-three".