6240999999 has 64 divisors (see below), whose sum is σ = 9749376000. Its totient is φ = 3516659712.

The previous prime is 6240999971. The next prime is 6241000019. The reversal of 6240999999 is 9999990426.

It is a Cunningham number, because it is equal to 79000²-1.

It is not a de Polignac number, because 6240999999 - 2¹² = 6240995903 is a prime.

6240999999 is a modest number, since divided by 99999 gives 62409 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6240999799) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4028277 + ... + 4029825.

It is an arithmetic number, because the mean of its divisors is an integer number (152334000).

Almost surely, 2^6240999999 is an apocalyptic number.

6240999999 is a deficient number, since it is larger than the sum of its proper divisors (3508376001).

6240999999 is a wasteful number, since it uses less digits than its factorization.

6240999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744.

The product of its (nonzero) digits is 25509168, while the sum is 66.

The square root of 6240999999 is about 78999.9999936709. Note that the first 5 decimals coincide. The cubic root of 6240999999 is about 1841.1311569219.

The spelling of 6240999999 in words is "six billion, two hundred forty million, nine hundred ninety-nine thousand, nine hundred ninety-nine".