396557755693 has 4 divisors (see below), whose sum is σ = 432608460768. Its totient is φ = 360507050620.

The previous prime is 396557755667. The next prime is 396557755729.

396557755693 is nontrivially palindromic in base 10.

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-396557755693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396557755093) 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, 18025352521 + ... + 18025352542.

It is an arithmetic number, because the mean of its divisors is an integer number (108152115192).

Almost surely, 2^396557755693 is an apocalyptic number.

It is an amenable number.

396557755693 is a deficient number, since it is larger than the sum of its proper divisors (36050705075).

396557755693 is a wasteful number, since it uses less digits than its factorization.

396557755693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36050705074.

The product of its digits is 803722500, while the sum is 70.

The spelling of 396557755693 in words is "three hundred ninety-six billion, five hundred fifty-seven million, seven hundred fifty-five thousand, six hundred ninety-three".