74820817573 has 4 divisors (see below), whose sum is σ = 78758755360. Its totient is φ = 70882879788.

The previous prime is 74820817543. The next prime is 74820817579. The reversal of 74820817573 is 37571802847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37571802847 = 37 ⋅1015454131.

It is a cyclic number.

It is not a de Polignac number, because 74820817573 - 2²¹ = 74818720421 is a prime.

It is a super-2 number, since 2×74820817573² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74820817573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74820817579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1968968865 + ... + 1968968902.

It is an arithmetic number, because the mean of its divisors is an integer number (19689688840).

Almost surely, 2^74820817573 is an apocalyptic number.

It is an amenable number.

74820817573 is a deficient number, since it is larger than the sum of its proper divisors (3937937787).

74820817573 is a wasteful number, since it uses less digits than its factorization.

74820817573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937937786.

The product of its (nonzero) digits is 2634240, while the sum is 52.

The spelling of 74820817573 in words is "seventy-four billion, eight hundred twenty million, eight hundred seventeen thousand, five hundred seventy-three".