6121521040 has 20 divisors (see below), whose sum is σ = 14232536604. Its totient is φ = 2448608384.

The previous prime is 6121521013. The next prime is 6121521059. The reversal of 6121521040 is 401251216.

It can be written as a sum of positive squares in 2 ways, for example, as 847275664 + 5274245376 = 29108^2 + 72624^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 38259427 + ... + 38259586.

Almost surely, 2^6121521040 is an apocalyptic number.

It is an amenable number.

6121521040 is an abundant number, since it is smaller than the sum of its proper divisors (8111015564).

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

6121521040 is a wasteful number, since it uses less digits than its factorization.

6121521040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76519026 (or 76519020 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 6121521040 is about 78240.1497953576. The cubic root of 6121521040 is about 1829.3063791136.

Adding to 6121521040 its reverse (401251216), we get a palindrome (6522772256).

The spelling of 6121521040 in words is "six billion, one hundred twenty-one million, five hundred twenty-one thousand, forty".