651885040171231 has 2 divisors, whose sum is σ = 651885040171232. Its totient is φ = 651885040171230.

The previous prime is 651885040171129. The next prime is 651885040171237. The reversal of 651885040171231 is 132171040588156.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 651885040171231 - 2¹³ = 651885040163039 is a prime.

It is a super-2 number, since 2×651885040171231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651885040171237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325942520085615 + 325942520085616.

It is an arithmetic number, because the mean of its divisors is an integer number (325942520085616).

Almost surely, 2^{651885040171231} is an apocalyptic number.

651885040171231 is a deficient number, since it is larger than the sum of its proper divisors (1).

651885040171231 is an equidigital number, since it uses as much as digits as its factorization.

651885040171231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 651885040171231 in words is "six hundred fifty-one trillion, eight hundred eighty-five billion, forty million, one hundred seventy-one thousand, two hundred thirty-one".