64195697915540 has 12 divisors (see below), whose sum is σ = 134810965622676. Its totient is φ = 25678279166208.

The previous prime is 64195697915539. The next prime is 64195697915567. The reversal of 64195697915540 is 4551979659146.

64195697915540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 23598181977616 + 40597515937924 = 4857796^2 + 6371618^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604892447869 + ... + 1604892447908.

It is an arithmetic number, because the mean of its divisors is an integer number (11234247135223).

Almost surely, 2^{64195697915540} is an apocalyptic number.

It is an amenable number.

64195697915540 is an abundant number, since it is smaller than the sum of its proper divisors (70615267707136).

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

64195697915540 is a wasteful number, since it uses less digits than its factorization.

64195697915540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209784895786 (or 3209784895784 counting only the distinct ones).

The product of its (nonzero) digits is 367416000, while the sum is 71.

The spelling of 64195697915540 in words is "sixty-four trillion, one hundred ninety-five billion, six hundred ninety-seven million, nine hundred fifteen thousand, five hundred forty".