64185481076 has 24 divisors (see below), whose sum is σ = 113797824000. Its totient is φ = 31672184544.

The previous prime is 64185481069. The next prime is 64185481097. The reversal of 64185481076 is 67018458146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672245 + ... + 761763.

It is an arithmetic number, because the mean of its divisors is an integer number (4741576000).

Almost surely, 2^64185481076 is an apocalyptic number.

It is an amenable number.

64185481076 is a deficient number, since it is larger than the sum of its proper divisors (49612342924).

64185481076 is a wasteful number, since it uses less digits than its factorization.

64185481076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91871 (or 91869 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 64185481076 in words is "sixty-four billion, one hundred eighty-five million, four hundred eighty-one thousand, seventy-six".