1979655529920 has 56 divisors (see below), whose sum is σ = 6285406310544. Its totient is φ = 527908141056.

The previous prime is 1979655529877. The next prime is 1979655529921. The reversal of 1979655529920 is 299255569791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979655529921) 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 7 ways as a sum of consecutive naturals, for example, 1031069629 + ... + 1031071548.

Almost surely, 2^{1979655529920} is an apocalyptic number.

1979655529920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979655529920 is an abundant number, since it is smaller than the sum of its proper divisors (4305750780624).

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

1979655529920 is a wasteful number, since it uses less digits than its factorization.

1979655529920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062141197 (or 2062141187 counting only the distinct ones).

The product of its (nonzero) digits is 137781000, while the sum is 69.

The spelling of 1979655529920 in words is "one trillion, nine hundred seventy-nine billion, six hundred fifty-five million, five hundred twenty-nine thousand, nine hundred twenty".