8791781461 has 8 divisors (see below), whose sum is σ = 8833428824. Its totient is φ = 8750177280.

The previous prime is 8791781447. The next prime is 8791781477. The reversal of 8791781461 is 1641871978.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 887682436 + 7904099025 = 29794^2 + 88905^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8791781461 - 2¹³ = 8791773269 is a prime.

It is the 93765-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8791781399 and 8791781408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8791781261) by changing a digit.

It is a nontrivial repunit in base 93764.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441655 + ... + 461131.

It is an arithmetic number, because the mean of its divisors is an integer number (1104178603).

Almost surely, 2^8791781461 is an apocalyptic number.

It is an amenable number.

8791781461 is a deficient number, since it is larger than the sum of its proper divisors (41647363).

8791781461 is a wasteful number, since it uses less digits than its factorization.

8791781461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21591.

The product of its digits is 677376, while the sum is 52.

The square root of 8791781461 is about 93764.5000039994. The cubic root of 8791781461 is about 2063.9173160001.

The spelling of 8791781461 in words is "eight billion, seven hundred ninety-one million, seven hundred eighty-one thousand, four hundred sixty-one".