4378539509 has 24 divisors (see below), whose sum is σ = 4822301952. Its totient is φ = 3966522560.

The previous prime is 4378539467. The next prime is 4378539523. The reversal of 4378539509 is 9059358734.

It is not a de Polignac number, because 4378539509 - 2²⁰ = 4377490933 is a prime.

It is a super-2 number, since 2×4378539509² = 38343216463747922162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4378539409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1023044 + ... + 1027314.

It is an arithmetic number, because the mean of its divisors is an integer number (200929248).

Almost surely, 2^4378539509 is an apocalyptic number.

It is an amenable number.

4378539509 is a deficient number, since it is larger than the sum of its proper divisors (443762443).

4378539509 is a wasteful number, since it uses less digits than its factorization.

4378539509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405 (or 4376 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 53.

The square root of 4378539509 is about 66170.5335402398. The cubic root of 4378539509 is about 1635.9741016747.

The spelling of 4378539509 in words is "four billion, three hundred seventy-eight million, five hundred thirty-nine thousand, five hundred nine".