1656397382801 has 8 divisors (see below), whose sum is σ = 1893033383424. Its totient is φ = 1419763332960.

The previous prime is 1656397382743. The next prime is 1656397382879. The reversal of 1656397382801 is 1082837936561.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1656397382801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656397381801) 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 7 ways as a sum of consecutive naturals, for example, 2908541 + ... + 3431093.

It is an arithmetic number, because the mean of its divisors is an integer number (236629172928).

Almost surely, 2^{1656397382801} is an apocalyptic number.

It is an amenable number.

1656397382801 is a deficient number, since it is larger than the sum of its proper divisors (236636000623).

1656397382801 is an equidigital number, since it uses as much as digits as its factorization.

1656397382801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975391.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 1656397382801 in words is "one trillion, six hundred fifty-six billion, three hundred ninety-seven million, three hundred eighty-two thousand, eight hundred one".