64611537451 has 2 divisors, whose sum is σ = 64611537452. Its totient is φ = 64611537450.

The previous prime is 64611537449. The next prime is 64611537469. The reversal of 64611537451 is 15473511646.

64611537451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64611537451 - 2¹ = 64611537449 is a prime.

Together with 64611537449, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 64611537398 and 64611537407.

It is not a weakly prime, because it can be changed into another prime (64621537451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32305768725 + 32305768726.

It is an arithmetic number, because the mean of its divisors is an integer number (32305768726).

Almost surely, 2^64611537451 is an apocalyptic number.

64611537451 is a deficient number, since it is larger than the sum of its proper divisors (1).

64611537451 is an equidigital number, since it uses as much as digits as its factorization.

64611537451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The spelling of 64611537451 in words is "sixty-four billion, six hundred eleven million, five hundred thirty-seven thousand, four hundred fifty-one".