1645610960 has 40 divisors (see below), whose sum is σ = 4372624896. Its totient is φ = 564209280.

The previous prime is 1645610947. The next prime is 1645610971. The reversal of 1645610960 is 690165461.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1468736 + ... + 1469855.

Almost surely, 2^1645610960 is an apocalyptic number.

1645610960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1645610960 is an abundant number, since it is smaller than the sum of its proper divisors (2727013936).

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

1645610960 is a wasteful number, since it uses less digits than its factorization.

1645610960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938611 (or 2938605 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1645610960 is about 40566.1307003761. The cubic root of 1645610960 is about 1180.6170668950.

The spelling of 1645610960 in words is "one billion, six hundred forty-five million, six hundred ten thousand, nine hundred sixty".