74887561 has 16 divisors (see below), whose sum is σ = 87677568. Its totient is φ = 62640000.

The previous prime is 74887559. The next prime is 74887573. The reversal of 74887561 is 16578847.

It is a cyclic number.

It is not a de Polignac number, because 74887561 - 2¹ = 74887559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74887861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50886 + ... + 52336.

It is an arithmetic number, because the mean of its divisors is an integer number (5479848).

Almost surely, 2^74887561 is an apocalyptic number.

It is an amenable number.

74887561 is a deficient number, since it is larger than the sum of its proper divisors (12790007).

74887561 is a wasteful number, since it uses less digits than its factorization.

74887561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632.

The product of its digits is 376320, while the sum is 46.

The square root of 74887561 is about 8653.7599342713. The cubic root of 74887561 is about 421.5054834139.

The spelling of 74887561 in words is "seventy-four million, eight hundred eighty-seven thousand, five hundred sixty-one".