2978773555128 has 32 divisors (see below), whose sum is σ = 8510781586560. Its totient is φ = 851078158560.

The previous prime is 2978773555111. The next prime is 2978773555183. The reversal of 2978773555128 is 8215553778792.

It is a super-3 number, since 3×2978773555128³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8865397318 + ... + 8865397653.

It is an arithmetic number, because the mean of its divisors is an integer number (265961924580).

Almost surely, 2^{2978773555128} is an apocalyptic number.

2978773555128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2978773555128 is an abundant number, since it is smaller than the sum of its proper divisors (5532008031432).

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

2978773555128 is a wasteful number, since it uses less digits than its factorization.

2978773555128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17730794987 (or 17730794983 counting only the distinct ones).

The product of its digits is 296352000, while the sum is 69.

The spelling of 2978773555128 in words is "two trillion, nine hundred seventy-eight billion, seven hundred seventy-three million, five hundred fifty-five thousand, one hundred twenty-eight".