74640203245 has 4 divisors (see below), whose sum is σ = 89568243900. Its totient is φ = 59712162592.

The previous prime is 74640203233. The next prime is 74640203303. The reversal of 74640203245 is 54230204647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54230204647 = 6977 ⋅7772711.

It can be written as a sum of positive squares in 2 ways, for example, as 12851169769 + 61789033476 = 113363^2 + 248574^2 .

It is a cyclic number.

It is not a de Polignac number, because 74640203245 - 2²³ = 74631814637 is a prime.

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, 7464020320 + ... + 7464020329.

It is an arithmetic number, because the mean of its divisors is an integer number (22392060975).

Almost surely, 2^74640203245 is an apocalyptic number.

It is an amenable number.

74640203245 is a deficient number, since it is larger than the sum of its proper divisors (14928040655).

74640203245 is a wasteful number, since it uses less digits than its factorization.

74640203245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14928040654.

The product of its (nonzero) digits is 161280, while the sum is 37.

It can be divided in two parts, 74640 and 203245, that added together give a triangular number (277885 = T₇₄₅).

The spelling of 74640203245 in words is "seventy-four billion, six hundred forty million, two hundred three thousand, two hundred forty-five".