74437548265121 has 4 divisors (see below), whose sum is σ = 78816227574852. Its totient is φ = 70058868955392.

The previous prime is 74437548265079. The next prime is 74437548265123. The reversal of 74437548265121 is 12156284573447.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50106068302096 + 24331479963025 = 7078564^2 + 4932695^2 .

It is a cyclic number.

It is not a de Polignac number, because 74437548265121 - 2²² = 74437544070817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74437548265123) 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, 2189339654840 + ... + 2189339654873.

It is an arithmetic number, because the mean of its divisors is an integer number (19704056893713).

Almost surely, 2^{74437548265121} is an apocalyptic number.

It is an amenable number.

74437548265121 is a deficient number, since it is larger than the sum of its proper divisors (4378679309731).

74437548265121 is a wasteful number, since it uses less digits than its factorization.

74437548265121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378679309730.

The product of its digits is 45158400, while the sum is 59.

The spelling of 74437548265121 in words is "seventy-four trillion, four hundred thirty-seven billion, five hundred forty-eight million, two hundred sixty-five thousand, one hundred twenty-one".