7514521998 has 16 divisors (see below), whose sum is σ = 15240721536. Its totient is φ = 2469561080.

The previous prime is 7514521997. The next prime is 7514522011. The reversal of 7514521998 is 8991254157.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 7514521998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7514521991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8819436 + ... + 8820287.

It is an arithmetic number, because the mean of its divisors is an integer number (952545096).

Almost surely, 2^7514521998 is an apocalyptic number.

7514521998 is an abundant number, since it is smaller than the sum of its proper divisors (7726199538).

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

7514521998 is a wasteful number, since it uses less digits than its factorization.

7514521998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17639799.

The product of its digits is 907200, while the sum is 51.

The square root of 7514521998 is about 86686.3426267368. The cubic root of 7514521998 is about 1958.6963771651.

The spelling of 7514521998 in words is "seven billion, five hundred fourteen million, five hundred twenty-one thousand, nine hundred ninety-eight".