503642166981 has 16 divisors (see below), whose sum is σ = 672828884928. Its totient is φ = 335108592000.

The previous prime is 503642166977. The next prime is 503642166997. The reversal of 503642166981 is 189661246305.

It is not a de Polignac number, because 503642166981 - 2² = 503642166977 is a prime.

It is a super-2 number, since 2×503642166981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503642166901) 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, 23522881 + ... + 23544281.

It is an arithmetic number, because the mean of its divisors is an integer number (42051805308).

Almost surely, 2^503642166981 is an apocalyptic number.

It is an amenable number.

503642166981 is a deficient number, since it is larger than the sum of its proper divisors (169186717947).

503642166981 is a wasteful number, since it uses less digits than its factorization.

503642166981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36292.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 503642166981 in words is "five hundred three billion, six hundred forty-two million, one hundred sixty-six thousand, nine hundred eighty-one".