8140138401 has 32 divisors (see below), whose sum is σ = 11497707648. Its totient is φ = 5116700160.

The previous prime is 8140138393. The next prime is 8140138411. The reversal of 8140138401 is 1048310418.

It is not a de Polignac number, because 8140138401 - 2³ = 8140138393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8140138411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427455 + ... + 446091.

It is an arithmetic number, because the mean of its divisors is an integer number (359303364).

Almost surely, 2^8140138401 is an apocalyptic number.

It is an amenable number.

8140138401 is a deficient number, since it is larger than the sum of its proper divisors (3357569247).

8140138401 is a wasteful number, since it uses less digits than its factorization.

8140138401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18801.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 8140138401 is about 90222.7155488018. The cubic root of 8140138401 is about 2011.6106658686.

Adding to 8140138401 its reverse (1048310418), we get a palindrome (9188448819).

The spelling of 8140138401 in words is "eight billion, one hundred forty million, one hundred thirty-eight thousand, four hundred one".