9091478611249 has 4 divisors (see below), whose sum is σ = 9091493834740. Its totient is φ = 9091463387760.

The previous prime is 9091478611247. The next prime is 9091478611307. The reversal of 9091478611249 is 9421168741909.

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 2606103321649 + 6485375289600 = 1614343^2 + 2546640^2 .

It is a cyclic number.

It is not a de Polignac number, because 9091478611249 - 2¹ = 9091478611247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9091478611247) 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, 6677742 + ... + 7923079.

It is an arithmetic number, because the mean of its divisors is an integer number (2272873458685).

Almost surely, 2^{9091478611249} is an apocalyptic number.

It is an amenable number.

9091478611249 is a deficient number, since it is larger than the sum of its proper divisors (15223491).

9091478611249 is a wasteful number, since it uses less digits than its factorization.

9091478611249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15223490.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 9091478611249 in words is "nine trillion, ninety-one billion, four hundred seventy-eight million, six hundred eleven thousand, two hundred forty-nine".