1656026656972 has 12 divisors (see below), whose sum is σ = 2898057827896. Its totient is φ = 828010134720.

The previous prime is 1656026656961. The next prime is 1656026656979. The reversal of 1656026656972 is 2796566206561.

It is a self number, because there is not a number n which added to its sum of digits gives 1656026656972.

It is not an unprimeable number, because it can be changed into a prime (1656026656979) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 667123 + ... + 1938325.

Almost surely, 2^{1656026656972} is an apocalyptic number.

It is an amenable number.

1656026656972 is a deficient number, since it is larger than the sum of its proper divisors (1242031170924).

1656026656972 is a wasteful number, since it uses less digits than its factorization.

1656026656972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596888 (or 1596886 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 61.

The spelling of 1656026656972 in words is "one trillion, six hundred fifty-six billion, twenty-six million, six hundred fifty-six thousand, nine hundred seventy-two".