74947616501 has 12 divisors (see below), whose sum is σ = 77668513380. Its totient is φ = 72321936288.

The previous prime is 74947616477. The next prime is 74947616503. The reversal of 74947616501 is 10561674947.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 51166892401 + 23780724100 = 226201^2 + 154210^2 .

It is a de Polignac number, because none of the positive numbers 2^k-74947616501 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74947616501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74947616503) 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 11 ways as a sum of consecutive naturals, for example, 42753041 + ... + 42754793.

It is an arithmetic number, because the mean of its divisors is an integer number (6472376115).

Almost surely, 2^74947616501 is an apocalyptic number.

It is an amenable number.

74947616501 is a deficient number, since it is larger than the sum of its proper divisors (2720896879).

74947616501 is an frugal number, since it uses more digits than its factorization.

74947616501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3593 (or 1782 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 74947616501 in words is "seventy-four billion, nine hundred forty-seven million, six hundred sixteen thousand, five hundred one".