64506786744 has 16 divisors (see below), whose sum is σ = 161266966920. Its totient is φ = 21502262240.

The previous prime is 64506786719. The next prime is 64506786763. The reversal of 64506786744 is 44768760546.

It is a super-2 number, since 2×64506786744² (a number of 22 digits) contains 22 as substring.

It is a congruent 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, 1343891367 + ... + 1343891414.

Almost surely, 2^64506786744 is an apocalyptic number.

It is an amenable number.

64506786744 is an abundant number, since it is smaller than the sum of its proper divisors (96760180176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64506786744 is a wasteful number, since it uses less digits than its factorization.

64506786744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687782790 (or 2687782786 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 57.

The spelling of 64506786744 in words is "sixty-four billion, five hundred six million, seven hundred eighty-six thousand, seven hundred forty-four".