1662623545 has 32 divisors (see below), whose sum is σ = 2336221440. Its totient is φ = 1122416640.

The previous prime is 1662623539. The next prime is 1662623549. The reversal of 1662623545 is 5453262661.

It is a happy number.

It is not a de Polignac number, because 1662623545 - 2⁹ = 1662623033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662623498 and 1662623507.

It is not an unprimeable number, because it can be changed into a prime (1662623549) 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 31 ways as a sum of consecutive naturals, for example, 56076 + ... + 80434.

It is an arithmetic number, because the mean of its divisors is an integer number (73006920).

Almost surely, 2^1662623545 is an apocalyptic number.

It is an amenable number.

1662623545 is a deficient number, since it is larger than the sum of its proper divisors (673597895).

1662623545 is a wasteful number, since it uses less digits than its factorization.

1662623545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24465.

The product of its digits is 259200, while the sum is 40.

The square root of 1662623545 is about 40775.2810535991. The cubic root of 1662623545 is about 1184.6715950386.

The spelling of 1662623545 in words is "one billion, six hundred sixty-two million, six hundred twenty-three thousand, five hundred forty-five".