7655904138 has 8 divisors (see below), whose sum is σ = 15311808288. Its totient is φ = 2551968044.

The previous prime is 7655904101. The next prime is 7655904149. The reversal of 7655904138 is 8314095567.

It is a sphenic number, since it is the product of 3 distinct primes.

7655904138 is an admirable number.

It is a super-2 number, since 2×7655904138² (a number of 21 digits) contains 22 as substring.

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, 637992006 + ... + 637992017.

It is an arithmetic number, because the mean of its divisors is an integer number (1913976036).

Almost surely, 2^7655904138 is an apocalyptic number.

7655904138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7655904138 is a wasteful number, since it uses less digits than its factorization.

7655904138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275984028.

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 7655904138 is about 87498.0236233939. The cubic root of 7655904138 is about 1970.9041121317.

The spelling of 7655904138 in words is "seven billion, six hundred fifty-five million, nine hundred four thousand, one hundred thirty-eight".