6519741940 has 12 divisors (see below), whose sum is σ = 13691458116. Its totient is φ = 2607896768.

The previous prime is 6519741937. The next prime is 6519741979. The reversal of 6519741940 is 491479156.

It can be written as a sum of positive squares in 2 ways, for example, as 907334884 + 5612407056 = 30122^2 + 74916^2 .

It is a congruent number.

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, 162993529 + ... + 162993568.

It is an arithmetic number, because the mean of its divisors is an integer number (1140954843).

Almost surely, 2^6519741940 is an apocalyptic number.

It is an amenable number.

6519741940 is an abundant number, since it is smaller than the sum of its proper divisors (7171716176).

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

6519741940 is a wasteful number, since it uses less digits than its factorization.

6519741940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325987106 (or 325987104 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 6519741940 is about 80744.9189732704. The cubic root of 6519741940 is about 1868.1430793233.

The spelling of 6519741940 in words is "six billion, five hundred nineteen million, seven hundred forty-one thousand, nine hundred forty".