1645309134 has 24 divisors (see below), whose sum is σ = 4074099120. Its totient is φ = 470088288.

The previous prime is 1645309121. The next prime is 1645309139. The reversal of 1645309134 is 4319035461.

1645309134 is a `hidden beast` number, since 1 + 6 + 4 + 530 + 91 + 34 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645309139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6528879 + ... + 6529130.

It is an arithmetic number, because the mean of its divisors is an integer number (169754130).

Almost surely, 2^1645309134 is an apocalyptic number.

1645309134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1645309134 is an abundant number, since it is smaller than the sum of its proper divisors (2428789986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645309134 is a wasteful number, since it uses less digits than its factorization.

1645309134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13058024 (or 13058021 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1645309134 is about 40562.4103573740. The cubic root of 1645309134 is about 1180.5448824149.

The spelling of 1645309134 in words is "one billion, six hundred forty-five million, three hundred nine thousand, one hundred thirty-four".