645151007 has 2 divisors, whose sum is σ = 645151008. Its totient is φ = 645151006.

The previous prime is 645150997. The next prime is 645151021. The reversal of 645151007 is 700151546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645151007 - 2²² = 640956703 is a prime.

It is a super-2 number, since 2×645151007² = 832439643666228098, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645151057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322575503 + 322575504.

It is an arithmetic number, because the mean of its divisors is an integer number (322575504).

Almost surely, 2^645151007 is an apocalyptic number.

645151007 is a deficient number, since it is larger than the sum of its proper divisors (1).

645151007 is an equidigital number, since it uses as much as digits as its factorization.

645151007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 645151007 is about 25399.8229718240. The cubic root of 645151007 is about 864.0796818480.

The spelling of 645151007 in words is "six hundred forty-five million, one hundred fifty-one thousand, seven".