64401547344 has 40 divisors (see below), whose sum is σ = 166382029440. Its totient is φ = 21465715968.

The previous prime is 64401547303. The next prime is 64401547349. The reversal of 64401547344 is 44374510446.

It is a junction number, because it is equal to n+sod(n) for n = 64401547296 and 64401547305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64401547349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841092 + ... + 914460.

It is an arithmetic number, because the mean of its divisors is an integer number (4159550736).

Almost surely, 2^64401547344 is an apocalyptic number.

It is an amenable number.

64401547344 is an abundant number, since it is smaller than the sum of its proper divisors (101980482096).

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

64401547344 is a wasteful number, since it uses less digits than its factorization.

64401547344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91667 (or 91661 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 42.

The spelling of 64401547344 in words is "sixty-four billion, four hundred one million, five hundred forty-seven thousand, three hundred forty-four".