74245185215 has 4 divisors (see below), whose sum is σ = 89094222264. Its totient is φ = 59396148168.

The previous prime is 74245185169. The next prime is 74245185239. The reversal of 74245185215 is 51258154247.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51258154247 = 257 ⋅199448071.

It is a cyclic number.

It is not a de Polignac number, because 74245185215 - 2⁶ = 74245185151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7424518517 + ... + 7424518526.

It is an arithmetic number, because the mean of its divisors is an integer number (22273555566).

Almost surely, 2^74245185215 is an apocalyptic number.

74245185215 is a deficient number, since it is larger than the sum of its proper divisors (14849037049).

74245185215 is a wasteful number, since it uses less digits than its factorization.

74245185215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14849037048.

The product of its digits is 448000, while the sum is 44.

The spelling of 74245185215 in words is "seventy-four billion, two hundred forty-five million, one hundred eighty-five thousand, two hundred fifteen".