74540021563 has 8 divisors (see below), whose sum is σ = 85634611200. Its totient is φ = 63556935720.

The previous prime is 74540021561. The next prime is 74540021579. The reversal of 74540021563 is 36512004547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74540021563 - 2¹ = 74540021561 is a prime.

It is a super-2 number, since 2×74540021563² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74540021561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27874513 + ... + 27877186.

It is an arithmetic number, because the mean of its divisors is an integer number (10704326400).

Almost surely, 2^74540021563 is an apocalyptic number.

74540021563 is a deficient number, since it is larger than the sum of its proper divisors (11094589637).

74540021563 is a wasteful number, since it uses less digits than its factorization.

74540021563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55751897.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 74540021563 in words is "seventy-four billion, five hundred forty million, twenty-one thousand, five hundred sixty-three".