4000100781 has 16 divisors (see below), whose sum is σ = 5361465600. Its totient is φ = 2652756288.

The previous prime is 4000100777. The next prime is 4000100801. The reversal of 4000100781 is 1870010004.

It is not a de Polignac number, because 4000100781 - 2² = 4000100777 is a prime.

It is a super-2 number, since 2×4000100781² = 32001612516313619922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000100701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1172380 + ... + 1175786.

It is an arithmetic number, because the mean of its divisors is an integer number (335091600).

Almost surely, 2^4000100781 is an apocalyptic number.

It is an amenable number.

4000100781 is a deficient number, since it is larger than the sum of its proper divisors (1361364819).

4000100781 is a wasteful number, since it uses less digits than its factorization.

4000100781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5348.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 4000100781 is about 63246.3499421113. The cubic root of 4000100781 is about 1587.4143835117.

Adding to 4000100781 its reverse (1870010004), we get a palindrome (5870110785).

The spelling of 4000100781 in words is "four billion, one hundred thousand, seven hundred eighty-one".