6121565540 has 24 divisors (see below), whose sum is σ = 13531882560. Its totient is φ = 2319751008.

The previous prime is 6121565537. The next prime is 6121565573. The reversal of 6121565540 is 455651216.

It is a self number, because there is not a number n which added to its sum of digits gives 6121565540.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8054312 + ... + 8055071.

It is an arithmetic number, because the mean of its divisors is an integer number (563828440).

Almost surely, 2^6121565540 is an apocalyptic number.

It is an amenable number.

6121565540 is an abundant number, since it is smaller than the sum of its proper divisors (7410317020).

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

6121565540 is a wasteful number, since it uses less digits than its factorization.

6121565540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16109411 (or 16109409 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 6121565540 is about 78240.4341756869. The cubic root of 6121565540 is about 1829.3108117775.

The spelling of 6121565540 in words is "six billion, one hundred twenty-one million, five hundred sixty-five thousand, five hundred forty".