492073199981 has 24 divisors (see below), whose sum is σ = 546403371192. Its totient is φ = 442768832000.

The previous prime is 492073199963. The next prime is 492073200037. The reversal of 492073199981 is 189991370294.

It can be written as a sum of positive squares in 4 ways, for example, as 13804135081 + 478269064900 = 117491^2 + 691570^2 .

It is a de Polignac number, because none of the positive numbers 2^k-492073199981 is a prime.

It is a super-2 number, since 2×492073199981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492073199081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66197441 + ... + 66204873.

It is an arithmetic number, because the mean of its divisors is an integer number (22766807133).

Almost surely, 2^492073199981 is an apocalyptic number.

It is an amenable number.

492073199981 is a deficient number, since it is larger than the sum of its proper divisors (54330171211).

492073199981 is a wasteful number, since it uses less digits than its factorization.

492073199981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12973 (or 12962 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 62.

The spelling of 492073199981 in words is "four hundred ninety-two billion, seventy-three million, one hundred ninety-nine thousand, nine hundred eighty-one".