64306424781 has 6 divisors (see below), whose sum is σ = 92887058030. Its totient is φ = 42870949848.

The previous prime is 64306424761. The next prime is 64306424857. The reversal of 64306424781 is 18742460346.

It can be written as a sum of positive squares in only one way, i.e., 62015940900 + 2290483881 = 249030^2 + 47859^2 .

It is not a de Polignac number, because 64306424781 - 2⁶ = 64306424717 is a prime.

It is a super-2 number, since 2×64306424781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64306424761) 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 in 5 ways as a sum of consecutive naturals, for example, 3572579146 + ... + 3572579163.

Almost surely, 2^64306424781 is an apocalyptic number.

It is an amenable number.

64306424781 is a deficient number, since it is larger than the sum of its proper divisors (28580633249).

64306424781 is a wasteful number, since it uses less digits than its factorization.

64306424781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7145158315 (or 7145158312 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 64306424781 in words is "sixty-four billion, three hundred six million, four hundred twenty-four thousand, seven hundred eighty-one".