72168732310 has 16 divisors (see below), whose sum is σ = 135551706336. Its totient is φ = 27612384448.

The previous prime is 72168732281. The next prime is 72168732319. The reversal of 72168732310 is 1323786127.

It is a happy number.

It is a super-2 number, since 2×72168732310² (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 (72168732319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156888319 + ... + 156888778.

It is an arithmetic number, because the mean of its divisors is an integer number (8471981646).

Almost surely, 2^72168732310 is an apocalyptic number.

72168732310 is a deficient number, since it is larger than the sum of its proper divisors (63382974026).

72168732310 is a wasteful number, since it uses less digits than its factorization.

72168732310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313777127.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 72168732310 in words is "seventy-two billion, one hundred sixty-eight million, seven hundred thirty-two thousand, three hundred ten".