2878142787081 has 45 divisors (see below), whose sum is σ = 4322400902589. Its totient is φ = 1908572625000.

The previous prime is 2878142787071. The next prime is 2878142787097. The reversal of 2878142787081 is 1807872418782.

The square root of 2878142787081 is 1696509.

It is a perfect power (a square), and thus also a powerful number.

2878142787081 is a `hidden beast` number, since 287 + 8 + 1 + 4 + 278 + 7 + 0 + 81 = 666.

It is not a de Polignac number, because 2878142787081 - 2⁵ = 2878142787049 is a prime.

It is a super-2 number, since 2×2878142787081² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2878142787071) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 3832413456 + ... + 3832414206.

Almost surely, 2^{2878142787081} is an apocalyptic number.

2878142787081 is the 1696509-th square number.

2878142787081 is the 848255-th centered octagonal number.

It is an amenable number.

2878142787081 is a deficient number, since it is larger than the sum of its proper divisors (1444258115508).

2878142787081 is an frugal number, since it uses more digits than its factorization.

2878142787081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 22478848, while the sum is 63.

The spelling of 2878142787081 in words is "two trillion, eight hundred seventy-eight billion, one hundred forty-two million, seven hundred eighty-seven thousand, eighty-one".