72607224638172 has 48 divisors (see below), whose sum is σ = 193620100584960. Its totient is φ = 20744831873472.

The previous prime is 72607224638101. The next prime is 72607224638177. The reversal of 72607224638172 is 27183642270627.

It is a super-2 number, since 2×72607224638172² (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 (72607224638177) 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, 19132729 + ... + 22611407.

It is an arithmetic number, because the mean of its divisors is an integer number (4033752095520).

Almost surely, 2^{72607224638172} is an apocalyptic number.

It is an amenable number.

72607224638172 is an abundant number, since it is smaller than the sum of its proper divisors (121012875946788).

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

72607224638172 is a wasteful number, since it uses less digits than its factorization.

72607224638172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727170 (or 3727168 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 57.

The spelling of 72607224638172 in words is "seventy-two trillion, six hundred seven billion, two hundred twenty-four million, six hundred thirty-eight thousand, one hundred seventy-two".