4645640397 has 4 divisors (see below), whose sum is σ = 6194187200. Its totient is φ = 3097093596.

The previous prime is 4645640369. The next prime is 4645640437. The reversal of 4645640397 is 7930465464.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4645640397 - 2⁶ = 4645640333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4645647397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774273397 + ... + 774273402.

It is an arithmetic number, because the mean of its divisors is an integer number (1548546800).

Almost surely, 2^4645640397 is an apocalyptic number.

It is an amenable number.

4645640397 is a deficient number, since it is larger than the sum of its proper divisors (1548546803).

4645640397 is a wasteful number, since it uses less digits than its factorization.

4645640397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548546802.

The product of its (nonzero) digits is 2177280, while the sum is 48.

The square root of 4645640397 is about 68158.9348288249. The cubic root of 4645640397 is about 1668.5857481787.

The spelling of 4645640397 in words is "four billion, six hundred forty-five million, six hundred forty thousand, three hundred ninety-seven".