2978558209955 has 4 divisors (see below), whose sum is σ = 3574269851952. Its totient is φ = 2382846567960.

The previous prime is 2978558209951. The next prime is 2978558210003. The reversal of 2978558209955 is 5599028558792.

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

It is not a de Polignac number, because 2978558209955 - 2² = 2978558209951 is a prime.

It is a super-2 number, since 2×2978558209955² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2978558209951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297855820991 + ... + 297855821000.

It is an arithmetic number, because the mean of its divisors is an integer number (893567462988).

Almost surely, 2^{2978558209955} is an apocalyptic number.

2978558209955 is a deficient number, since it is larger than the sum of its proper divisors (595711641997).

2978558209955 is an equidigital number, since it uses as much as digits as its factorization.

2978558209955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595711641996.

The product of its (nonzero) digits is 816480000, while the sum is 74.

The spelling of 2978558209955 in words is "two trillion, nine hundred seventy-eight billion, five hundred fifty-eight million, two hundred nine thousand, nine hundred fifty-five".