501116155489 has 4 divisors (see below), whose sum is σ = 506746674180. Its totient is φ = 495485636800.

The previous prime is 501116155471. The next prime is 501116155493. The reversal of 501116155489 is 984551611105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984551611105 = 5 ⋅196910322221.

It can be written as a sum of positive squares in 2 ways, for example, as 95719078225 + 405397077264 = 309385^2 + 636708^2 .

It is a cyclic number.

It is not a de Polignac number, because 501116155489 - 2¹³ = 501116147297 is a prime.

It is a super-2 number, since 2×501116155489² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501116155429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2815259212 + ... + 2815259389.

It is an arithmetic number, because the mean of its divisors is an integer number (126686668545).

Almost surely, 2^501116155489 is an apocalyptic number.

It is an amenable number.

501116155489 is a deficient number, since it is larger than the sum of its proper divisors (5630518691).

501116155489 is an equidigital number, since it uses as much as digits as its factorization.

501116155489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5630518690.

The product of its (nonzero) digits is 216000, while the sum is 46.

The spelling of 501116155489 in words is "five hundred one billion, one hundred sixteen million, one hundred fifty-five thousand, four hundred eighty-nine".