1646713140 has 48 divisors (see below), whose sum is σ = 4653116160. Its totient is φ = 435093120.

The previous prime is 1646713073. The next prime is 1646713141. The reversal of 1646713140 is 413176461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646713141) 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, 119356 + ... + 132435.

It is an arithmetic number, because the mean of its divisors is an integer number (96939920).

Almost surely, 2^1646713140 is an apocalyptic number.

1646713140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1646713140 is an abundant number, since it is smaller than the sum of its proper divisors (3006403020).

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

1646713140 is a wasteful number, since it uses less digits than its factorization.

1646713140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251912 (or 251910 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1646713140 is about 40579.7134046065. The cubic root of 1646713140 is about 1180.8805884979.

The spelling of 1646713140 in words is "one billion, six hundred forty-six million, seven hundred thirteen thousand, one hundred forty".