138245855 has 16 divisors (see below), whose sum is σ = 182849184. Its totient is φ = 99502080.

The previous prime is 138245837. The next prime is 138245869. The reversal of 138245855 is 558542831.

It is not a de Polignac number, because 138245855 - 2¹⁶ = 138180319 is a prime.

It is a super-2 number, since 2×138245855² = 38223832849362050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7622 + ... + 18291.

It is an arithmetic number, because the mean of its divisors is an integer number (11428074).

Almost surely, 2^138245855 is an apocalyptic number.

138245855 is a deficient number, since it is larger than the sum of its proper divisors (44603329).

138245855 is a wasteful number, since it uses less digits than its factorization.

138245855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26026.

The product of its digits is 192000, while the sum is 41.

The square root of 138245855 is about 11757.7997516542. The cubic root of 138245855 is about 517.0716253976.

The spelling of 138245855 in words is "one hundred thirty-eight million, two hundred forty-five thousand, eight hundred fifty-five".