863966616593 has 4 divisors (see below), whose sum is σ = 867019502448. Its totient is φ = 860913730740.

The previous prime is 863966616523. The next prime is 863966616619. The reversal of 863966616593 is 395616669368.

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 863966616593 - 2¹⁴ = 863966600209 is a prime.

It is a super-4 number, since 4×863966616593⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863966616503) 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, 1526442503 + ... + 1526443068.

It is an arithmetic number, because the mean of its divisors is an integer number (216754875612).

Almost surely, 2^863966616593 is an apocalyptic number.

It is an amenable number.

863966616593 is a deficient number, since it is larger than the sum of its proper divisors (3052885855).

863966616593 is a wasteful number, since it uses less digits than its factorization.

863966616593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052885854.

The product of its digits is 226748160, while the sum is 68.

The spelling of 863966616593 in words is "eight hundred sixty-three billion, nine hundred sixty-six million, six hundred sixteen thousand, five hundred ninety-three".