978126037643 has 4 divisors (see below), whose sum is σ = 978159437568. Its totient is φ = 978092637720.

The previous prime is 978126037639. The next prime is 978126037663. The reversal of 978126037643 is 346730621879.

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

It is a cyclic number.

It is not a de Polignac number, because 978126037643 - 2² = 978126037639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978126037663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16655996 + ... + 16714617.

It is an arithmetic number, because the mean of its divisors is an integer number (244539859392).

Almost surely, 2^978126037643 is an apocalyptic number.

978126037643 is a deficient number, since it is larger than the sum of its proper divisors (33399925).

978126037643 is a wasteful number, since it uses less digits than its factorization.

978126037643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33399924.

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 978126037643 in words is "nine hundred seventy-eight billion, one hundred twenty-six million, thirty-seven thousand, six hundred forty-three".