3640456634 has 4 divisors (see below), whose sum is σ = 5460684954. Its totient is φ = 1820228316.

The previous prime is 3640456607. The next prime is 3640456667. The reversal of 3640456634 is 4366540463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4366540463 = 113 ⋅38641951.

It can be written as a sum of positive squares in only one way, i.e., 3256414225 + 384042409 = 57065^2 + 19597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3640456591 and 3640456600.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910114157 + ... + 910114160.

Almost surely, 2^3640456634 is an apocalyptic number.

3640456634 is a deficient number, since it is larger than the sum of its proper divisors (1820228320).

3640456634 is a wasteful number, since it uses less digits than its factorization.

3640456634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820228319.

The product of its (nonzero) digits is 622080, while the sum is 41.

The square root of 3640456634 is about 60336.1967147416. The cubic root of 3640456634 is about 1538.3386584483.

The spelling of 3640456634 in words is "three billion, six hundred forty million, four hundred fifty-six thousand, six hundred thirty-four".