1662404545 has 16 divisors (see below), whose sum is σ = 2025918720. Its totient is φ = 1309302144.

The previous prime is 1662404533. The next prime is 1662404581. The reversal of 1662404545 is 5454042661.

It is a cyclic number.

It is not a de Polignac number, because 1662404545 - 2⁷ = 1662404417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210376 + ... + 218134.

It is an arithmetic number, because the mean of its divisors is an integer number (126619920).

Almost surely, 2^1662404545 is an apocalyptic number.

It is an amenable number.

1662404545 is a deficient number, since it is larger than the sum of its proper divisors (363514175).

1662404545 is an equidigital number, since it uses as much as digits as its factorization.

1662404545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8424.

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 1662404545 is about 40772.5955146346. The cubic root of 1662404545 is about 1184.6195779575.

The spelling of 1662404545 in words is "one billion, six hundred sixty-two million, four hundred four thousand, five hundred forty-five".