72198451992 has 32 divisors (see below), whose sum is σ = 181162183680. Its totient is φ = 23977343520.

The previous prime is 72198451933. The next prime is 72198451993. The reversal of 72198451992 is 29915489127.

It is a super-2 number, since 2×72198451992² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72198451993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5543808 + ... + 5556815.

It is an arithmetic number, because the mean of its divisors is an integer number (5661318240).

Almost surely, 2^72198451992 is an apocalyptic number.

It is an amenable number.

72198451992 is an abundant number, since it is smaller than the sum of its proper divisors (108963731688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72198451992 is a wasteful number, since it uses less digits than its factorization.

72198451992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100903 (or 11100899 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 57.

The spelling of 72198451992 in words is "seventy-two billion, one hundred ninety-eight million, four hundred fifty-one thousand, nine hundred ninety-two".