64421451451 has 12 divisors (see below), whose sum is σ = 74974560120. Its totient is φ = 55192361280.

The previous prime is 64421451439. The next prime is 64421451463. The reversal of 64421451451 is 15415412446.

It is an interprime number because it is at equal distance from previous prime (64421451439) and next prime (64421451463).

It is not a de Polignac number, because 64421451451 - 2¹³ = 64421443259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64421451451.

It is not an unprimeable number, because it can be changed into a prime (64421451491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204445 + ... + 413086.

It is an arithmetic number, because the mean of its divisors is an integer number (6247880010).

Almost surely, 2^64421451451 is an apocalyptic number.

64421451451 is a deficient number, since it is larger than the sum of its proper divisors (10553108669).

64421451451 is a wasteful number, since it uses less digits than its factorization.

64421451451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619674 (or 619667 counting only the distinct ones).

The product of its digits is 76800, while the sum is 37.

Adding to 64421451451 its reverse (15415412446), we get a palindrome (79836863897).

The spelling of 64421451451 in words is "sixty-four billion, four hundred twenty-one million, four hundred fifty-one thousand, four hundred fifty-one".