74521449602261 has 4 divisors (see below), whose sum is σ = 74734978111500. Its totient is φ = 74307921093024.

The previous prime is 74521449602251. The next prime is 74521449602267. The reversal of 74521449602261 is 16220694412547.

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 49616259542161 + 24905190060100 = 7043881^2 + 4990510^2 .

It is a cyclic number.

It is not a de Polignac number, because 74521449602261 - 2³⁴ = 74504269733077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74521449602267) 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, 106764254096 + ... + 106764254793.

It is an arithmetic number, because the mean of its divisors is an integer number (18683744527875).

Almost surely, 2^{74521449602261} is an apocalyptic number.

It is an amenable number.

74521449602261 is a deficient number, since it is larger than the sum of its proper divisors (213528509239).

74521449602261 is a wasteful number, since it uses less digits than its factorization.

74521449602261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213528509238.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 74521449602261 in words is "seventy-four trillion, five hundred twenty-one billion, four hundred forty-nine million, six hundred two thousand, two hundred sixty-one".