6515995951242 has 48 divisors (see below), whose sum is σ = 14714899849728. Its totient is φ = 2081527031520.

The previous prime is 6515995951183. The next prime is 6515995951243. The reversal of 6515995951242 is 2421595995156.

6515995951242 is a `hidden beast` number, since 6 + 5 + 15 + 9 + 9 + 595 + 1 + 24 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6515995951242.

It is not an unprimeable number, because it can be changed into a prime (6515995951243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56628993 + ... + 56743940.

It is an arithmetic number, because the mean of its divisors is an integer number (306560413536).

Almost surely, 2^{6515995951242} is an apocalyptic number.

6515995951242 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6515995951242 is an abundant number, since it is smaller than the sum of its proper divisors (8198903898486).

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

6515995951242 is a wasteful number, since it uses less digits than its factorization.

6515995951242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113373075 (or 113373072 counting only the distinct ones).

The product of its digits is 43740000, while the sum is 63.

The spelling of 6515995951242 in words is "six trillion, five hundred fifteen billion, nine hundred ninety-five million, nine hundred fifty-one thousand, two hundred forty-two".