978740486755 has 4 divisors (see below), whose sum is σ = 1174488584112. Its totient is φ = 782992389400.

The previous prime is 978740486741. The next prime is 978740486827. The reversal of 978740486755 is 557684047879.

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

It is not a de Polignac number, because 978740486755 - 2¹⁹ = 978739962467 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97874048671 + ... + 97874048680.

It is an arithmetic number, because the mean of its divisors is an integer number (293622146028).

Almost surely, 2^978740486755 is an apocalyptic number.

978740486755 is a deficient number, since it is larger than the sum of its proper divisors (195748097357).

978740486755 is a wasteful number, since it uses less digits than its factorization.

978740486755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195748097356.

The product of its (nonzero) digits is 474163200, while the sum is 70.

The spelling of 978740486755 in words is "nine hundred seventy-eight billion, seven hundred forty million, four hundred eighty-six thousand, seven hundred fifty-five".