7919855938 has 8 divisors (see below), whose sum is σ = 12169534860. Its totient is φ = 3863344320.

The previous prime is 7919855893. The next prime is 7919855947. The reversal of 7919855938 is 8395589197.

It can be written as a sum of positive squares in 2 ways, for example, as 7301189809 + 618666129 = 85447^2 + 24873^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 7919855938.

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, 48291723 + ... + 48291886.

Almost surely, 2^7919855938 is an apocalyptic number.

7919855938 is a deficient number, since it is larger than the sum of its proper divisors (4249678922).

7919855938 is a wasteful number, since it uses less digits than its factorization.

7919855938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96583652.

The product of its digits is 24494400, while the sum is 64.

The square root of 7919855938 is about 88993.5724532957. The cubic root of 7919855938 is about 1993.2989008779.

The spelling of 7919855938 in words is "seven billion, nine hundred nineteen million, eight hundred fifty-five thousand, nine hundred thirty-eight".