73428707857 has 4 divisors (see below), whose sum is σ = 73569107440. Its totient is φ = 73288308276.

The previous prime is 73428707761. The next prime is 73428707873. The reversal of 73428707857 is 75870782437.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73428707857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73428707887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70199007 + ... + 70200052.

It is an arithmetic number, because the mean of its divisors is an integer number (18392276860).

Almost surely, 2^73428707857 is an apocalyptic number.

It is an amenable number.

73428707857 is a deficient number, since it is larger than the sum of its proper divisors (140399583).

73428707857 is a wasteful number, since it uses less digits than its factorization.

73428707857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140399582.

The product of its (nonzero) digits is 18439680, while the sum is 58.

The spelling of 73428707857 in words is "seventy-three billion, four hundred twenty-eight million, seven hundred seven thousand, eight hundred fifty-seven".