72178579037 has 2 divisors, whose sum is σ = 72178579038. Its totient is φ = 72178579036.

The previous prime is 72178579007. The next prime is 72178579069. The reversal of 72178579037 is 73097587127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71915685241 + 262893796 = 268171^2 + 16214^2 .

It is a cyclic number.

It is not a de Polignac number, because 72178579037 - 2³⁴ = 54998709853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72178579007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36089289518 + 36089289519.

It is an arithmetic number, because the mean of its divisors is an integer number (36089289519).

Almost surely, 2^72178579037 is an apocalyptic number.

It is an amenable number.

72178579037 is a deficient number, since it is larger than the sum of its proper divisors (1).

72178579037 is an equidigital number, since it uses as much as digits as its factorization.

72178579037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5186160, while the sum is 56.

The spelling of 72178579037 in words is "seventy-two billion, one hundred seventy-eight million, five hundred seventy-nine thousand, thirty-seven".