501540686465 has 64 divisors (see below), whose sum is σ = 780441177600. Its totient is φ = 300473432064.

The previous prime is 501540686461. The next prime is 501540686483. The reversal of 501540686465 is 564686045105.

It is a happy number.

It is not a de Polignac number, because 501540686465 - 2² = 501540686461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501540686461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9561149 + ... + 9613461.

It is an arithmetic number, because the mean of its divisors is an integer number (12194393400).

Almost surely, 2^501540686465 is an apocalyptic number.

It is an amenable number.

501540686465 is a deficient number, since it is larger than the sum of its proper divisors (278900491135).

501540686465 is a wasteful number, since it uses less digits than its factorization.

501540686465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53466.

The product of its (nonzero) digits is 3456000, while the sum is 50.

The spelling of 501540686465 in words is "five hundred one billion, five hundred forty million, six hundred eighty-six thousand, four hundred sixty-five".