1646642046 has 32 divisors (see below), whose sum is σ = 3798938880. Its totient is φ = 466070976.

The previous prime is 1646642029. The next prime is 1646642047. The reversal of 1646642046 is 6402466461.

1646642046 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1646642046² = 5422860055310132232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1646641995 and 1646642013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646642047) 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, 178711 + ... + 187698.

It is an arithmetic number, because the mean of its divisors is an integer number (118716840).

Almost surely, 2^1646642046 is an apocalyptic number.

1646642046 is an abundant number, since it is smaller than the sum of its proper divisors (2152296834).

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

1646642046 is a wasteful number, since it uses less digits than its factorization.

1646642046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366528.

The product of its (nonzero) digits is 165888, while the sum is 39.

The square root of 1646642046 is about 40578.8374155791. The cubic root of 1646642046 is about 1180.8635940923.

The spelling of 1646642046 in words is "one billion, six hundred forty-six million, six hundred forty-two thousand, forty-six".