1641662506 has 32 divisors (see below), whose sum is σ = 2715389568. Its totient is φ = 738186240.

The previous prime is 1641662461. The next prime is 1641662507. The reversal of 1641662506 is 6052661461.

It is not an unprimeable number, because it can be changed into a prime (1641662507) 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, 1063171 + ... + 1064713.

It is an arithmetic number, because the mean of its divisors is an integer number (84855924).

Almost surely, 2^1641662506 is an apocalyptic number.

1641662506 is a deficient number, since it is larger than the sum of its proper divisors (1073727062).

1641662506 is a wasteful number, since it uses less digits than its factorization.

1641662506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1641662506 is about 40517.4345930243. The cubic root of 1641662506 is about 1179.6720591126.

The spelling of 1641662506 in words is "one billion, six hundred forty-one million, six hundred sixty-two thousand, five hundred six".