72420371176372 has 6 divisors (see below), whose sum is σ = 126735649558658. Its totient is φ = 36210185588184.

The previous prime is 72420371176357. The next prime is 72420371176379. The reversal of 72420371176372 is 27367117302427.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72296689540516 + 123681635856 = 8502746^2 + 351684^2 .

It is a super-2 number, since 2×72420371176372² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72420371176379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9052546397043 + ... + 9052546397050.

Almost surely, 2^{72420371176372} is an apocalyptic number.

It is an amenable number.

72420371176372 is a deficient number, since it is larger than the sum of its proper divisors (54315278382286).

72420371176372 is a wasteful number, since it uses less digits than its factorization.

72420371176372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18105092794097 (or 18105092794095 counting only the distinct ones).

The product of its (nonzero) digits is 4148928, while the sum is 52.

Adding to 72420371176372 its reverse (27367117302427), we get a palindrome (99787488478799).

The spelling of 72420371176372 in words is "seventy-two trillion, four hundred twenty billion, three hundred seventy-one million, one hundred seventy-six thousand, three hundred seventy-two".