138649941801 has 72 divisors (see below), whose sum is σ = 235721513664. Its totient is φ = 78295694400.

The previous prime is 138649941791. The next prime is 138649941811. The reversal of 138649941801 is 108149946831.

138649941801 is a `hidden beast` number, since 1 + 38 + 6 + 499 + 41 + 80 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (138649941791) and next prime (138649941811).

It is not a de Polignac number, because 138649941801 - 2¹⁸ = 138649679657 is a prime.

It is a super-2 number, since 2×138649941801² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138649941811) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 26142916 + ... + 26148218.

It is an arithmetic number, because the mean of its divisors is an integer number (3273909912).

Almost surely, 2^138649941801 is an apocalyptic number.

It is an amenable number.

138649941801 is a deficient number, since it is larger than the sum of its proper divisors (97071571863).

138649941801 is a wasteful number, since it uses less digits than its factorization.

138649941801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6011 (or 6001 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 138649941801 in words is "one hundred thirty-eight billion, six hundred forty-nine million, nine hundred forty-one thousand, eight hundred one".