2906139681 has 32 divisors (see below), whose sum is σ = 4582656000. Its totient is φ = 1813858560.

The previous prime is 2906139679. The next prime is 2906139727. The reversal of 2906139681 is 1869316092.

It is a happy number.

2906139681 is a `hidden beast` number, since 29 + 0 + 613 + 9 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 2906139681 - 2¹ = 2906139679 is a prime.

It is a super-2 number, since 2×2906139681² = 16891295690965563522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2906139641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71095 + ... + 104243.

It is an arithmetic number, because the mean of its divisors is an integer number (143208000).

Almost surely, 2^2906139681 is an apocalyptic number.

It is an amenable number.

2906139681 is a deficient number, since it is larger than the sum of its proper divisors (1676516319).

2906139681 is a wasteful number, since it uses less digits than its factorization.

2906139681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33366 (or 33360 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 2906139681 is about 53908.6234381847. The cubic root of 2906139681 is about 1427.0488113332.

The spelling of 2906139681 in words is "two billion, nine hundred six million, one hundred thirty-nine thousand, six hundred eighty-one".