72540740611025 has 12 divisors (see below), whose sum is σ = 89958071881500. Its totient is φ = 58027719247680.

The previous prime is 72540740610997. The next prime is 72540740611033. The reversal of 72540740611025 is 52011604704527.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12746385163264 + 59794355447761 = 3570208^2 + 7732681^2 .

It is not a de Polignac number, because 72540740611025 - 2²⁰ = 72540739562449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121527350 + ... + 122122799.

It is an arithmetic number, because the mean of its divisors is an integer number (7496505990125).

Almost surely, 2^{72540740611025} is an apocalyptic number.

It is an amenable number.

72540740611025 is a deficient number, since it is larger than the sum of its proper divisors (17417331270475).

72540740611025 is a wasteful number, since it uses less digits than its factorization.

72540740611025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243662068 (or 243662063 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 72540740611025 in words is "seventy-two trillion, five hundred forty billion, seven hundred forty million, six hundred eleven thousand, twenty-five".