6738177640 has 24 divisors (see below), whose sum is σ = 15162067890. Its totient is φ = 2695063392.

The previous prime is 6738177617. The next prime is 6738177673. The reversal of 6738177640 is 467718376.

It can be written as a sum of positive squares in only one way, i.e., 6064359876 + 673817764 = 77874^2 + 25958^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 512671 + ... + 525649.

Almost surely, 2^6738177640 is an apocalyptic number.

It is an amenable number.

6738177640 is an abundant number, since it is smaller than the sum of its proper divisors (8423890250).

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

6738177640 is an frugal number, since it uses more digits than its factorization.

6738177640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25969 (or 12986 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 49.

The square root of 6738177640 is about 82086.4035026508. The cubic root of 6738177640 is about 1888.7775789284. Note that the first 3 decimals are identical.

The spelling of 6738177640 in words is "six billion, seven hundred thirty-eight million, one hundred seventy-seven thousand, six hundred forty".