1978632629364 has 12 divisors (see below), whose sum is σ = 4616809468544. Its totient is φ = 659544209784.

The previous prime is 1978632629333. The next prime is 1978632629371. The reversal of 1978632629364 is 4639262368791.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1978632629295 and 1978632629304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82443026212 + ... + 82443026235.

Almost surely, 2^{1978632629364} is an apocalyptic number.

It is an amenable number.

1978632629364 is an abundant number, since it is smaller than the sum of its proper divisors (2638176839180).

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

1978632629364 is a wasteful number, since it uses less digits than its factorization.

1978632629364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164886052454 (or 164886052452 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 66.

The spelling of 1978632629364 in words is "one trillion, nine hundred seventy-eight billion, six hundred thirty-two million, six hundred twenty-nine thousand, three hundred sixty-four".