7475721498 has 88 divisors (see below), whose sum is σ = 19225301088. Its totient is φ = 2135684232.

The previous prime is 7475721481. The next prime is 7475721541. The reversal of 7475721498 is 8941275747.

7475721498 is a `hidden beast` number, since 7 + 475 + 72 + 14 + 98 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 43 ways as a sum of consecutive naturals, for example, 822165 + ... + 831207.

Almost surely, 2^7475721498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7475721498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9612650544).

7475721498 is an abundant number, since it is smaller than the sum of its proper divisors (11749579590).

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

7475721498 is an frugal number, since it uses more digits than its factorization.

7475721498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9082 (or 9055 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The square root of 7475721498 is about 86462.2547589409. The cubic root of 7475721498 is about 1955.3193791005.

The spelling of 7475721498 in words is "seven billion, four hundred seventy-five million, seven hundred twenty-one thousand, four hundred ninety-eight".