1649442705 has 32 divisors (see below), whose sum is σ = 2659785984. Its totient is φ = 872841216.

The previous prime is 1649442703. The next prime is 1649442709. The reversal of 1649442705 is 5072449461.

It is not a de Polignac number, because 1649442705 - 2¹ = 1649442703 is a prime.

It is a super-2 number, since 2×1649442705² = 5441322474155434050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1649442701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1205932 + ... + 1207298.

It is an arithmetic number, because the mean of its divisors is an integer number (83118312).

Almost surely, 2^1649442705 is an apocalyptic number.

1649442705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1649442705 is a deficient number, since it is larger than the sum of its proper divisors (1010343279).

1649442705 is a wasteful number, since it uses less digits than its factorization.

1649442705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 1649442705 is about 40613.3316166010. The cubic root of 1649442705 is about 1181.5326978272.

The spelling of 1649442705 in words is "one billion, six hundred forty-nine million, four hundred forty-two thousand, seven hundred five".