72674742121 has 2 divisors, whose sum is σ = 72674742122. Its totient is φ = 72674742120.

The previous prime is 72674742109. The next prime is 72674742137. The reversal of 72674742121 is 12124747627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68231186521 + 4443555600 = 261211^2 + 66660^2 .

It is a cyclic number.

It is not a de Polignac number, because 72674742121 - 2⁹ = 72674741609 is a prime.

It is not a weakly prime, because it can be changed into another prime (72674742181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36337371060 + 36337371061.

It is an arithmetic number, because the mean of its divisors is an integer number (36337371061).

Almost surely, 2^72674742121 is an apocalyptic number.

It is an amenable number.

72674742121 is a deficient number, since it is larger than the sum of its proper divisors (1).

72674742121 is an equidigital number, since it uses as much as digits as its factorization.

72674742121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 263424, while the sum is 43.

The spelling of 72674742121 in words is "seventy-two billion, six hundred seventy-four million, seven hundred forty-two thousand, one hundred twenty-one".