138495511 has 48 divisors (see below), whose sum is σ = 183859200. Its totient is φ = 104134800.

The previous prime is 138495493. The next prime is 138495523. The reversal of 138495511 is 115594831.

It is not a de Polignac number, because 138495511 - 2⁹ = 138494999 is a prime.

It is a super-2 number, since 2×138495511² = 38362013134302242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138495571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1950606 + ... + 1950676.

It is an arithmetic number, because the mean of its divisors is an integer number (3830400).

Almost surely, 2^138495511 is an apocalyptic number.

138495511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138495511 is a deficient number, since it is larger than the sum of its proper divisors (45363689).

138495511 is an equidigital number, since it uses as much as digits as its factorization.

138495511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 136 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The square root of 138495511 is about 11768.4115750597. The cubic root of 138495511 is about 517.3826953735.

The spelling of 138495511 in words is "one hundred thirty-eight million, four hundred ninety-five thousand, five hundred eleven".