64505740451 has 2 divisors, whose sum is σ = 64505740452. Its totient is φ = 64505740450.

The previous prime is 64505740441. The next prime is 64505740469. The reversal of 64505740451 is 15404750546.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64505740451 is a prime.

It is a super-2 number, since 2×64505740451² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64505740399 and 64505740408.

It is not a weakly prime, because it can be changed into another prime (64505740441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32252870225 + 32252870226.

It is an arithmetic number, because the mean of its divisors is an integer number (32252870226).

Almost surely, 2^64505740451 is an apocalyptic number.

64505740451 is a deficient number, since it is larger than the sum of its proper divisors (1).

64505740451 is an equidigital number, since it uses as much as digits as its factorization.

64505740451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336000, while the sum is 41.

The spelling of 64505740451 in words is "sixty-four billion, five hundred five million, seven hundred forty thousand, four hundred fifty-one".