1642653106 has 4 divisors (see below), whose sum is σ = 2463979662. Its totient is φ = 821326552.

The previous prime is 1642653097. The next prime is 1642653143. The reversal of 1642653106 is 6013562461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1169982025 + 472671081 = 34205^2 + 21741^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410663275 + ... + 410663278.

Almost surely, 2^1642653106 is an apocalyptic number.

1642653106 is a deficient number, since it is larger than the sum of its proper divisors (821326556).

1642653106 is an equidigital number, since it uses as much as digits as its factorization.

1642653106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821326555.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1642653106 is about 40529.6571167337. The cubic root of 1642653106 is about 1179.9092877696.

The spelling of 1642653106 in words is "one billion, six hundred forty-two million, six hundred fifty-three thousand, one hundred six".