9251378485 has 4 divisors (see below), whose sum is σ = 11101654188. Its totient is φ = 7401102784.

The previous prime is 9251378473. The next prime is 9251378489. The reversal of 9251378485 is 5848731529.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6912592164 + 2338786321 = 83142^2 + 48361^2 .

It is a cyclic number.

It is not a de Polignac number, because 9251378485 - 2²¹ = 9249281333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9251378489) 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, 925137844 + ... + 925137853.

It is an arithmetic number, because the mean of its divisors is an integer number (2775413547).

Almost surely, 2^9251378485 is an apocalyptic number.

It is an amenable number.

9251378485 is a deficient number, since it is larger than the sum of its proper divisors (1850275703).

9251378485 is a wasteful number, since it uses less digits than its factorization.

9251378485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850275702.

The product of its digits is 2419200, while the sum is 52.

The square root of 9251378485 is about 96184.0864436524. The cubic root of 9251378485 is about 2099.2724981900.

The spelling of 9251378485 in words is "nine billion, two hundred fifty-one million, three hundred seventy-eight thousand, four hundred eighty-five".