64187783740 has 48 divisors (see below), whose sum is σ = 135931428864. Its totient is φ = 25458753600.

The previous prime is 64187783719. The next prime is 64187783743. The reversal of 64187783740 is 4738778146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64187783743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5355955 + ... + 5367925.

It is an arithmetic number, because the mean of its divisors is an integer number (2831904768).

Almost surely, 2^64187783740 is an apocalyptic number.

It is an amenable number.

64187783740 is an abundant number, since it is smaller than the sum of its proper divisors (71743645124).

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

64187783740 is a wasteful number, since it uses less digits than its factorization.

64187783740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14218 (or 14216 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 55.

The spelling of 64187783740 in words is "sixty-four billion, one hundred eighty-seven million, seven hundred eighty-three thousand, seven hundred forty".