72163315757776 has 80 divisors (see below), whose sum is σ = 153152148416400. Its totient is φ = 32786836619264.

The previous prime is 72163315757749. The next prime is 72163315757779. The reversal of 72163315757776 is 67775751336127.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2506598234176 + 69656717523600 = 1583224^2 + 8346060^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72163315757779) 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, 203277840 + ... + 203632528.

It is an arithmetic number, because the mean of its divisors is an integer number (1914401855205).

Almost surely, 2^{72163315757776} is an apocalyptic number.

It is an amenable number.

72163315757776 is an abundant number, since it is smaller than the sum of its proper divisors (80988832658624).

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

72163315757776 is a wasteful number, since it uses less digits than its factorization.

72163315757776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380536 (or 380530 counting only the distinct ones).

The product of its digits is 272273400, while the sum is 67.

The spelling of 72163315757776 in words is "seventy-two trillion, one hundred sixty-three billion, three hundred fifteen million, seven hundred fifty-seven thousand, seven hundred seventy-six".