73844818711557 has 4 divisors (see below), whose sum is σ = 98459758282080. Its totient is φ = 49229879141036.

The previous prime is 73844818711459. The next prime is 73844818711583. The reversal of 73844818711557 is 75511781844837.

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 not a de Polignac number, because 73844818711557 - 2¹⁶ = 73844818646021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73844818711491 and 73844818711500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73844818711757) 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, 12307469785257 + ... + 12307469785262.

It is an arithmetic number, because the mean of its divisors is an integer number (24614939570520).

Almost surely, 2^{73844818711557} is an apocalyptic number.

It is an amenable number.

73844818711557 is a deficient number, since it is larger than the sum of its proper divisors (24614939570523).

73844818711557 is a wasteful number, since it uses less digits than its factorization.

73844818711557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24614939570522.

The product of its digits is 210739200, while the sum is 69.

The spelling of 73844818711557 in words is "seventy-three trillion, eight hundred forty-four billion, eight hundred eighteen million, seven hundred eleven thousand, five hundred fifty-seven".