2978439566958 has 32 divisors (see below), whose sum is σ = 6621671901600. Its totient is φ = 992375592768.

The previous prime is 2978439566953. The next prime is 2978439566969. The reversal of 2978439566958 is 8596659348792.

2978439566958 is a `hidden beast` number, since 2 + 9 + 7 + 8 + 43 + 9 + 566 + 9 + 5 + 8 = 666.

It is a super-2 number, since 2×2978439566958² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978439566953) 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 15 ways as a sum of consecutive naturals, for example, 12031791 + ... + 12276842.

It is an arithmetic number, because the mean of its divisors is an integer number (206927246925).

Almost surely, 2^{2978439566958} is an apocalyptic number.

2978439566958 is an abundant number, since it is smaller than the sum of its proper divisors (3643232334642).

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

2978439566958 is a wasteful number, since it uses less digits than its factorization.

2978439566958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24310913 (or 24310907 counting only the distinct ones).

The product of its digits is 7054387200, while the sum is 81.

The spelling of 2978439566958 in words is "two trillion, nine hundred seventy-eight billion, four hundred thirty-nine million, five hundred sixty-six thousand, nine hundred fifty-eight".