980745778656 has 120 divisors (see below), whose sum is σ = 3296395594800. Its totient is φ = 280213074432.

The previous prime is 980745778603. The next prime is 980745778657. The reversal of 980745778656 is 656877547089.

980745778656 is a `hidden beast` number, since 98 + 0 + 7 + 457 + 7 + 86 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (980745778657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27008581 + ... + 27044868.

It is an arithmetic number, because the mean of its divisors is an integer number (27469963290).

Almost surely, 2^980745778656 is an apocalyptic number.

980745778656 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

980745778656 is an abundant number, since it is smaller than the sum of its proper divisors (2315649816144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

980745778656 is a wasteful number, since it uses less digits than its factorization.

980745778656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54053478 (or 54053461 counting only the distinct ones).

The product of its (nonzero) digits is 711244800, while the sum is 72.

The spelling of 980745778656 in words is "nine hundred eighty billion, seven hundred forty-five million, seven hundred seventy-eight thousand, six hundred fifty-six".