645160407 has 8 divisors (see below), whose sum is σ = 860333184. Its totient is φ = 430047288.

The previous prime is 645160403. The next prime is 645160429. The reversal of 645160407 is 704061546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 645160407 - 2² = 645160403 is a prime.

It is a super-4 number, since 4×645160407⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645160403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27798 + ... + 45420.

It is an arithmetic number, because the mean of its divisors is an integer number (107541648).

Almost surely, 2^645160407 is an apocalyptic number.

645160407 is a deficient number, since it is larger than the sum of its proper divisors (215172777).

645160407 is a wasteful number, since it uses less digits than its factorization.

645160407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29829.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 645160407 is about 25400.0080118098. The cubic root of 645160407 is about 864.0838784415.

The spelling of 645160407 in words is "six hundred forty-five million, one hundred sixty thousand, four hundred seven".