74521221550 has 12 divisors (see below), whose sum is σ = 138609472176. Its totient is φ = 29808488600.

The previous prime is 74521221521. The next prime is 74521221559. The reversal of 74521221550 is 5512212547.

It is a super-2 number, since 2×74521221550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74521221559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 745212166 + ... + 745212265.

It is an arithmetic number, because the mean of its divisors is an integer number (11550789348).

Almost surely, 2^74521221550 is an apocalyptic number.

74521221550 is a deficient number, since it is larger than the sum of its proper divisors (64088250626).

74521221550 is a wasteful number, since it uses less digits than its factorization.

74521221550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490424443 (or 1490424438 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The spelling of 74521221550 in words is "seventy-four billion, five hundred twenty-one million, two hundred twenty-one thousand, five hundred fifty".