4000138900155 has 24 divisors (see below), whose sum is σ = 6934259140848. Its totient is φ = 2133196629696.

The previous prime is 4000138900151. The next prime is 4000138900169. The reversal of 4000138900155 is 5510098310004.

4000138900155 is a `hidden beast` number, since 400 + 0 + 13 + 8 + 90 + 0 + 155 = 666.

It is not a de Polignac number, because 4000138900155 - 2² = 4000138900151 is a prime.

It is a super-2 number, since 2×4000138900155² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4000138900151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3930277 + ... + 4842246.

It is an arithmetic number, because the mean of its divisors is an integer number (288927464202).

Almost surely, 2^{4000138900155} is an apocalyptic number.

4000138900155 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

4000138900155 is a deficient number, since it is larger than the sum of its proper divisors (2934120240693).

4000138900155 is a wasteful number, since it uses less digits than its factorization.

4000138900155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8782667 (or 8782664 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 4000138900155 in words is "four trillion, one hundred thirty-eight million, nine hundred thousand, one hundred fifty-five".