72372509012 has 6 divisors (see below), whose sum is σ = 126651890778. Its totient is φ = 36186254504.

The previous prime is 72372508997. The next prime is 72372509017. The reversal of 72372509012 is 21090527327.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 58876110736 + 13496398276 = 242644^2 + 116174^2 .

It is a super-2 number, since 2×72372509012² (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 (72372509017) 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 as a sum of consecutive naturals, namely, 9046563623 + ... + 9046563630.

It is an arithmetic number, because the mean of its divisors is an integer number (21108648463).

Almost surely, 2^72372509012 is an apocalyptic number.

It is an amenable number.

72372509012 is a deficient number, since it is larger than the sum of its proper divisors (54279381766).

72372509012 is a wasteful number, since it uses less digits than its factorization.

72372509012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18093127257 (or 18093127255 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 72372509012 in words is "seventy-two billion, three hundred seventy-two million, five hundred nine thousand, twelve".