73715193491 has 4 divisors (see below), whose sum is σ = 73760502552. Its totient is φ = 73669884432.

The previous prime is 73715193479. The next prime is 73715193527. The reversal of 73715193491 is 19439151737.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73715193491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73715193401) 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, 22652090 + ... + 22655343.

It is an arithmetic number, because the mean of its divisors is an integer number (18440125638).

Almost surely, 2^73715193491 is an apocalyptic number.

73715193491 is a deficient number, since it is larger than the sum of its proper divisors (45309061).

73715193491 is a wasteful number, since it uses less digits than its factorization.

73715193491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45309060.

The product of its digits is 714420, while the sum is 50.

The spelling of 73715193491 in words is "seventy-three billion, seven hundred fifteen million, one hundred ninety-three thousand, four hundred ninety-one".