645429525 has 48 divisors (see below), whose sum is σ = 1209714240. Its totient is φ = 301017600.

The previous prime is 645429523. The next prime is 645429541. The reversal of 645429525 is 525924546.

645429525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645429525 - 2¹ = 645429523 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645429523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1105 + ... + 35945.

It is an arithmetic number, because the mean of its divisors is an integer number (25202380).

Almost surely, 2^645429525 is an apocalyptic number.

645429525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

645429525 is a deficient number, since it is larger than the sum of its proper divisors (564284715).

645429525 is a wasteful number, since it uses less digits than its factorization.

645429525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34886 (or 34881 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The square root of 645429525 is about 25405.3050562279. The cubic root of 645429525 is about 864.2040078422.

The spelling of 645429525 in words is "six hundred forty-five million, four hundred twenty-nine thousand, five hundred twenty-five".