74320280251 has 16 divisors (see below), whose sum is σ = 87338549440. Its totient is φ = 61906446720.

The previous prime is 74320280249. The next prime is 74320280269. The reversal of 74320280251 is 15208202347.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 74320280251 - 2¹ = 74320280249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74320280231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41641 + ... + 387781.

It is an arithmetic number, because the mean of its divisors is an integer number (5458659340).

Almost surely, 2^74320280251 is an apocalyptic number.

74320280251 is a deficient number, since it is larger than the sum of its proper divisors (13018269189).

74320280251 is a wasteful number, since it uses less digits than its factorization.

74320280251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347014.

The product of its (nonzero) digits is 26880, while the sum is 34.

Adding to 74320280251 its reverse (15208202347), we get a palindrome (89528482598).

The spelling of 74320280251 in words is "seventy-four billion, three hundred twenty million, two hundred eighty thousand, two hundred fifty-one".