138526654942149 has 16 divisors (see below), whose sum is σ = 196833433853952. Its totient is φ = 86456352018608.

The previous prime is 138526654942121. The next prime is 138526654942213. The reversal of 138526654942149 is 941249456625831.

It is not a de Polignac number, because 138526654942149 - 2⁸ = 138526654941893 is a prime.

It is a super-2 number, since 2×138526654942149² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138526654942349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21357791229 + ... + 21357797714.

It is an arithmetic number, because the mean of its divisors is an integer number (12302089615872).

Almost surely, 2^{138526654942149} is an apocalyptic number.

It is an amenable number.

138526654942149 is a deficient number, since it is larger than the sum of its proper divisors (58306778911803).

138526654942149 is a wasteful number, since it uses less digits than its factorization.

138526654942149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42715589016.

The product of its digits is 447897600, while the sum is 69.

The spelling of 138526654942149 in words is "one hundred thirty-eight trillion, five hundred twenty-six billion, six hundred fifty-four million, nine hundred forty-two thousand, one hundred forty-nine".