978823286749 has 32 divisors (see below), whose sum is σ = 1293353865216. Its totient is φ = 717177265920.

The previous prime is 978823286689. The next prime is 978823286789. The reversal of 978823286749 is 947682328879.

It is a cyclic number.

It is not a de Polignac number, because 978823286749 - 2⁹ = 978823286237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978823286789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1039744 + ... + 1743190.

It is an arithmetic number, because the mean of its divisors is an integer number (40417308288).

Almost surely, 2^978823286749 is an apocalyptic number.

It is an amenable number.

978823286749 is a deficient number, since it is larger than the sum of its proper divisors (314530578467).

978823286749 is a wasteful number, since it uses less digits than its factorization.

978823286749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704545.

The product of its digits is 585252864, while the sum is 73.

The spelling of 978823286749 in words is "nine hundred seventy-eight billion, eight hundred twenty-three million, two hundred eighty-six thousand, seven hundred forty-nine".