506139465 has 128 divisors (see below), whose sum is σ = 965260800. Its totient is φ = 224501760.

The previous prime is 506139463. The next prime is 506139481. The reversal of 506139465 is 564931605.

It is not a de Polignac number, because 506139465 - 2¹ = 506139463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506139463) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8578606 + ... + 8578664.

It is an arithmetic number, because the mean of its divisors is an integer number (7541100).

Almost surely, 2^506139465 is an apocalyptic number.

It is an amenable number.

506139465 is a deficient number, since it is larger than the sum of its proper divisors (459121335).

506139465 is a wasteful number, since it uses less digits than its factorization.

506139465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 506139465 is about 22497.5435325726. The cubic root of 506139465 is about 796.9359172500.

The spelling of 506139465 in words is "five hundred six million, one hundred thirty-nine thousand, four hundred sixty-five".