74421221502 has 16 divisors (see below), whose sum is σ = 148857057792. Its totient is φ = 24804638040.

The previous prime is 74421221491. The next prime is 74421221503. The reversal of 74421221502 is 20512212447.

It is a self number, because there is not a number n which added to its sum of digits gives 74421221502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74421221503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542188 + ... + 665439.

It is an arithmetic number, because the mean of its divisors is an integer number (9303566112).

Almost surely, 2^74421221502 is an apocalyptic number.

74421221502 is an abundant number, since it is smaller than the sum of its proper divisors (74435836290).

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

74421221502 is a wasteful number, since it uses less digits than its factorization.

74421221502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217903.

The product of its (nonzero) digits is 8960, while the sum is 30.

Adding to 74421221502 its reverse (20512212447), we get a palindrome (94933433949).

The spelling of 74421221502 in words is "seventy-four billion, four hundred twenty-one million, two hundred twenty-one thousand, five hundred two".