8781617797 has 4 divisors (see below), whose sum is σ = 8782733536. Its totient is φ = 8780502060.

The previous prime is 8781617791. The next prime is 8781617843. The reversal of 8781617797 is 7977161878.

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 8781617797 - 2¹¹ = 8781615749 is a prime.

It is a super-2 number, since 2×8781617797² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8781617791) 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, 545979 + ... + 561832.

It is an arithmetic number, because the mean of its divisors is an integer number (2195683384).

Almost surely, 2^8781617797 is an apocalyptic number.

It is an amenable number.

8781617797 is a deficient number, since it is larger than the sum of its proper divisors (1115739).

8781617797 is a wasteful number, since it uses less digits than its factorization.

8781617797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115738.

The product of its digits is 8297856, while the sum is 61.

The square root of 8781617797 is about 93710.2865058047. The cubic root of 8781617797 is about 2063.1216846549.

The spelling of 8781617797 in words is "eight billion, seven hundred eighty-one million, six hundred seventeen thousand, seven hundred ninety-seven".