74011721817 has 16 divisors (see below), whose sum is σ = 109478050560. Its totient is φ = 44095323600.

The previous prime is 74011721813. The next prime is 74011721857. The reversal of 74011721817 is 71812711047.

It is not a de Polignac number, because 74011721817 - 2² = 74011721813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74011721813) 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, 19004659 + ... + 19008552.

It is an arithmetic number, because the mean of its divisors is an integer number (6842378160).

Almost surely, 2^74011721817 is an apocalyptic number.

It is an amenable number.

74011721817 is a deficient number, since it is larger than the sum of its proper divisors (35466328743).

74011721817 is a wasteful number, since it uses less digits than its factorization.

74011721817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38013284.

The product of its (nonzero) digits is 21952, while the sum is 39.

The spelling of 74011721817 in words is "seventy-four billion, eleven million, seven hundred twenty-one thousand, eight hundred seventeen".