640148477608 has 16 divisors (see below), whose sum is σ = 1200314842560. Its totient is φ = 320064519600.

The previous prime is 640148477567. The next prime is 640148477677. The reversal of 640148477608 is 806774841046.

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, 931078 + ... + 1465333.

It is an arithmetic number, because the mean of its divisors is an integer number (75019677660).

Almost surely, 2^640148477608 is an apocalyptic number.

It is an amenable number.

640148477608 is a deficient number, since it is larger than the sum of its proper divisors (560166364952).

640148477608 is a wasteful number, since it uses less digits than its factorization.

640148477608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429808 (or 2429804 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 55.

The spelling of 640148477608 in words is "six hundred forty billion, one hundred forty-eight million, four hundred seventy-seven thousand, six hundred eight".