64543326451 has 4 divisors (see below), whose sum is σ = 64555670304. Its totient is φ = 64530982600.

The previous prime is 64543326433. The next prime is 64543326493. The reversal of 64543326451 is 15462334546.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64543326451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64543326398 and 64543326407.

It is not an unprimeable number, because it can be changed into a prime (64543326431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6164080 + ... + 6174541.

It is an arithmetic number, because the mean of its divisors is an integer number (16138917576).

Almost surely, 2^64543326451 is an apocalyptic number.

64543326451 is a deficient number, since it is larger than the sum of its proper divisors (12343853).

64543326451 is a wasteful number, since it uses less digits than its factorization.

64543326451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12343852.

The product of its digits is 1036800, while the sum is 43.

The spelling of 64543326451 in words is "sixty-four billion, five hundred forty-three million, three hundred twenty-six thousand, four hundred fifty-one".