72504527861 has 2 divisors, whose sum is σ = 72504527862. Its totient is φ = 72504527860.

The previous prime is 72504527831. The next prime is 72504527923. The reversal of 72504527861 is 16872540527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46444560100 + 26059967761 = 215510^2 + 161431^2 .

It is a cyclic number.

It is not a de Polignac number, because 72504527861 - 2¹⁰ = 72504526837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72504527831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36252263930 + 36252263931.

It is an arithmetic number, because the mean of its divisors is an integer number (36252263931).

Almost surely, 2^72504527861 is an apocalyptic number.

It is an amenable number.

72504527861 is a deficient number, since it is larger than the sum of its proper divisors (1).

72504527861 is an equidigital number, since it uses as much as digits as its factorization.

72504527861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 72504527861 in words is "seventy-two billion, five hundred four million, five hundred twenty-seven thousand, eight hundred sixty-one".