501661001139 has 8 divisors (see below), whose sum is σ = 670808948160. Its totient is φ = 333476860776.

The previous prime is 501661001137. The next prime is 501661001209. The reversal of 501661001139 is 931100166105.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 501661001139 - 2¹ = 501661001137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501661001137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240950449 + ... + 240952530.

It is an arithmetic number, because the mean of its divisors is an integer number (83851118520).

Almost surely, 2^501661001139 is an apocalyptic number.

501661001139 is a deficient number, since it is larger than the sum of its proper divisors (169147947021).

501661001139 is a wasteful number, since it uses less digits than its factorization.

501661001139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481903329.

The product of its (nonzero) digits is 4860, while the sum is 33.

The spelling of 501661001139 in words is "five hundred one billion, six hundred sixty-one million, one thousand, one hundred thirty-nine".