61464341451 has 4 divisors (see below), whose sum is σ = 81952455272. Its totient is φ = 40976227632.

The previous prime is 61464341447. The next prime is 61464341453. The reversal of 61464341451 is 15414346416.

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

It is not a de Polignac number, because 61464341451 - 2² = 61464341447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61464341453) 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 3 ways as a sum of consecutive naturals, for example, 10244056906 + ... + 10244056911.

It is an arithmetic number, because the mean of its divisors is an integer number (20488113818).

Almost surely, 2^61464341451 is an apocalyptic number.

61464341451 is a deficient number, since it is larger than the sum of its proper divisors (20488113821).

61464341451 is a wasteful number, since it uses less digits than its factorization.

61464341451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20488113820.

The product of its digits is 138240, while the sum is 39.

Adding to 61464341451 its reverse (15414346416), we get a palindrome (76878687867).

The spelling of 61464341451 in words is "sixty-one billion, four hundred sixty-four million, three hundred forty-one thousand, four hundred fifty-one".