2078581281 has 16 divisors (see below), whose sum is σ = 3200018304. Its totient is φ = 1175514624.

The previous prime is 2078581273. The next prime is 2078581319. The reversal of 2078581281 is 1821858702.

It is not a de Polignac number, because 2078581281 - 2³ = 2078581273 is a prime.

It is a super-2 number, since 2×2078581281² = 8641000283447201922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2078581481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508170 + ... + 512243.

It is an arithmetic number, because the mean of its divisors is an integer number (200001144).

Almost surely, 2^2078581281 is an apocalyptic number.

2078581281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2078581281 is a deficient number, since it is larger than the sum of its proper divisors (1121437023).

2078581281 is a wasteful number, since it uses less digits than its factorization.

2078581281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020520.

The product of its (nonzero) digits is 71680, while the sum is 42.

The square root of 2078581281 is about 45591.4606149002. The cubic root of 2078581281 is about 1276.2105700404.

The spelling of 2078581281 in words is "two billion, seventy-eight million, five hundred eighty-one thousand, two hundred eighty-one".