1656384645 has 8 divisors (see below), whose sum is σ = 2650215456. Its totient is φ = 883405136.

The previous prime is 1656384643. The next prime is 1656384683. The reversal of 1656384645 is 5464836561.

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 1656384645 - 2¹ = 1656384643 is a prime.

It is a super-2 number, since 2×1656384645² = 5487220184383552050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1656384594 and 1656384603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656384643) 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, 55212807 + ... + 55212836.

It is an arithmetic number, because the mean of its divisors is an integer number (331276932).

Almost surely, 2^1656384645 is an apocalyptic number.

1656384645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1656384645 is a deficient number, since it is larger than the sum of its proper divisors (993830811).

1656384645 is a wasteful number, since it uses less digits than its factorization.

1656384645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110425651.

The product of its digits is 2073600, while the sum is 48.

The square root of 1656384645 is about 40698.7056919505. The cubic root of 1656384645 is about 1183.1879335115.

The spelling of 1656384645 in words is "one billion, six hundred fifty-six million, three hundred eighty-four thousand, six hundred forty-five".