1646741740 has 24 divisors (see below), whose sum is σ = 3952180512. Its totient is φ = 564597120.

The previous prime is 1646741729. The next prime is 1646741749. The reversal of 1646741740 is 471476461.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1646741693 and 1646741702.

It is not an unprimeable number, because it can be changed into a prime (1646741749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5881081 + ... + 5881360.

It is an arithmetic number, because the mean of its divisors is an integer number (164674188).

Almost surely, 2^1646741740 is an apocalyptic number.

1646741740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1646741740 is an abundant number, since it is smaller than the sum of its proper divisors (2305438772).

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

1646741740 is a wasteful number, since it uses less digits than its factorization.

1646741740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11762457 (or 11762455 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 1646741740 is about 40580.0657959053. The cubic root of 1646741740 is about 1180.8874249425.

The spelling of 1646741740 in words is "one billion, six hundred forty-six million, seven hundred forty-one thousand, seven hundred forty".