64496469421 has 2 divisors, whose sum is σ = 64496469422. Its totient is φ = 64496469420.

The previous prime is 64496469409. The next prime is 64496469467. The reversal of 64496469421 is 12496469446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53162524900 + 11333944521 = 230570^2 + 106461^2 .

It is a cyclic number.

It is not a de Polignac number, because 64496469421 - 2¹⁹ = 64495945133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64496409421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32248234710 + 32248234711.

It is an arithmetic number, because the mean of its divisors is an integer number (32248234711).

Almost surely, 2^64496469421 is an apocalyptic number.

It is an amenable number.

64496469421 is a deficient number, since it is larger than the sum of its proper divisors (1).

64496469421 is an equidigital number, since it uses as much as digits as its factorization.

64496469421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 55.

The spelling of 64496469421 in words is "sixty-four billion, four hundred ninety-six million, four hundred sixty-nine thousand, four hundred twenty-one".