2978409581 has 24 divisors (see below), whose sum is σ = 3675022560. Its totient is φ = 2399997600.

The previous prime is 2978409559. The next prime is 2978409583. The reversal of 2978409581 is 1859048792.

It is not a de Polignac number, because 2978409581 - 2⁶ = 2978409517 is a prime.

It is a super-2 number, since 2×2978409581² = 17741847264385191122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978409583) 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 23 ways as a sum of consecutive naturals, for example, 109751 + ... + 134171.

It is an arithmetic number, because the mean of its divisors is an integer number (153125940).

Almost surely, 2^2978409581 is an apocalyptic number.

It is an amenable number.

2978409581 is a deficient number, since it is larger than the sum of its proper divisors (696612979).

2978409581 is a wasteful number, since it uses less digits than its factorization.

2978409581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24585 (or 24578 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

The square root of 2978409581 is about 54574.8072007588. The cubic root of 2978409581 is about 1438.7813733587.

The spelling of 2978409581 in words is "two billion, nine hundred seventy-eight million, four hundred nine thousand, five hundred eighty-one".