3640542705 has 32 divisors (see below), whose sum is σ = 6594203520. Its totient is φ = 1904984640.

The previous prime is 3640542683. The next prime is 3640542733. The reversal of 3640542705 is 5072450463.

3640542705 is a `hidden beast` number, since 3 + 6 + 40 + 542 + 70 + 5 = 666.

It is not a de Polignac number, because 3640542705 - 2¹² = 3640538609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3640542705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247251 + ... + 261560.

It is an arithmetic number, because the mean of its divisors is an integer number (206068860).

Almost surely, 2^3640542705 is an apocalyptic number.

It is an amenable number.

3640542705 is a deficient number, since it is larger than the sum of its proper divisors (2953660815).

3640542705 is a wasteful number, since it uses less digits than its factorization.

3640542705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508878 (or 508872 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 3640542705 is about 60336.9099722550. The cubic root of 3640542705 is about 1538.3507819552.

The spelling of 3640542705 in words is "three billion, six hundred forty million, five hundred forty-two thousand, seven hundred five".