651885040171129 has 2 divisors, whose sum is σ = 651885040171130. Its totient is φ = 651885040171128.

The previous prime is 651885040171093. The next prime is 651885040171231. The reversal of 651885040171129 is 921171040588156.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 332237126481129 + 319647913690000 = 18227373^2 + 17878700^2 .

It is a cyclic number.

It is not a de Polignac number, because 651885040171129 - 2⁴¹ = 649686016915577 is a prime.

It is not a weakly prime, because it can be changed into another prime (651885040471129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325942520085564 + 325942520085565.

It is an arithmetic number, because the mean of its divisors is an integer number (325942520085565).

Almost surely, 2^{651885040171129} is an apocalyptic number.

It is an amenable number.

651885040171129 is a deficient number, since it is larger than the sum of its proper divisors (1).

651885040171129 is an equidigital number, since it uses as much as digits as its factorization.

651885040171129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4838400, while the sum is 58.

The spelling of 651885040171129 in words is "six hundred fifty-one trillion, eight hundred eighty-five billion, forty million, one hundred seventy-one thousand, one hundred twenty-nine".