1669545240 has 64 divisors (see below), whose sum is σ = 5463970560. Its totient is φ = 404737920.

The previous prime is 1669545223. The next prime is 1669545247. The reversal of 1669545240 is 425459661.

It is a junction number, because it is equal to n+sod(n) for n = 1669545192 and 1669545201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669545247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631084 + ... + 633723.

It is an arithmetic number, because the mean of its divisors is an integer number (85374540).

Almost surely, 2^1669545240 is an apocalyptic number.

1669545240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1669545240 is an abundant number, since it is smaller than the sum of its proper divisors (3794425320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1669545240 is a wasteful number, since it uses less digits than its factorization.

1669545240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264832 (or 1264828 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 1669545240 is about 40860.0690160944. The cubic root of 1669545240 is about 1186.3132941134.

The spelling of 1669545240 in words is "one billion, six hundred sixty-nine million, five hundred forty-five thousand, two hundred forty".