501661001115 has 24 divisors (see below), whose sum is σ = 915311301840. Its totient is φ = 253470821184.

The previous prime is 501661001089. The next prime is 501661001137. The reversal of 501661001115 is 511100166105.

It is not a de Polignac number, because 501661001115 - 2¹¹ = 501660999067 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293368152 + ... + 293369861.

It is an arithmetic number, because the mean of its divisors is an integer number (38137970910).

Almost surely, 2^501661001115 is an apocalyptic number.

501661001115 is a deficient number, since it is larger than the sum of its proper divisors (413650300725).

501661001115 is a wasteful number, since it uses less digits than its factorization.

501661001115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586738043 (or 586738040 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 501661001115 in words is "five hundred one billion, six hundred sixty-one million, one thousand, one hundred fifteen".