501239665461 has 16 divisors (see below), whose sum is σ = 670409671680. Its totient is φ = 333114933360.

The previous prime is 501239665447. The next prime is 501239665463. The reversal of 501239665461 is 164566932105.

It is not a de Polignac number, because 501239665461 - 2⁵ = 501239665429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 501239665461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501239665463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12132706 + ... + 12173948.

It is an arithmetic number, because the mean of its divisors is an integer number (41900604480).

Almost surely, 2^501239665461 is an apocalyptic number.

It is an amenable number.

501239665461 is a deficient number, since it is larger than the sum of its proper divisors (169170006219).

501239665461 is a wasteful number, since it uses less digits than its factorization.

501239665461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53816.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 501239665461 in words is "five hundred one billion, two hundred thirty-nine million, six hundred sixty-five thousand, four hundred sixty-one".