64548438715 has 4 divisors (see below), whose sum is σ = 77458126464. Its totient is φ = 51638750968.

The previous prime is 64548438701. The next prime is 64548438727. The reversal of 64548438715 is 51783484546.

64548438715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 64548438715 - 2⁹ = 64548438203 is a prime.

It is a super-2 number, since 2×64548438715² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6454843867 + ... + 6454843876.

It is an arithmetic number, because the mean of its divisors is an integer number (19364531616).

Almost surely, 2^64548438715 is an apocalyptic number.

64548438715 is a deficient number, since it is larger than the sum of its proper divisors (12909687749).

64548438715 is a wasteful number, since it uses less digits than its factorization.

64548438715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12909687748.

The product of its digits is 12902400, while the sum is 55.

The spelling of 64548438715 in words is "sixty-four billion, five hundred forty-eight million, four hundred thirty-eight thousand, seven hundred fifteen".