138161510 has 16 divisors (see below), whose sum is σ = 257266800. Its totient is φ = 53358816.

The previous prime is 138161501. The next prime is 138161531. The reversal of 138161510 is 15161831.

It is a self number, because there is not a number n which added to its sum of digits gives 138161510.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237920 + ... + 238499.

It is an arithmetic number, because the mean of its divisors is an integer number (16079175).

Almost surely, 2^138161510 is an apocalyptic number.

138161510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138161510 is a deficient number, since it is larger than the sum of its proper divisors (119105290).

138161510 is a wasteful number, since it uses less digits than its factorization.

138161510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476455.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 138161510 is about 11754.2124363991. The cubic root of 138161510 is about 516.9664473709.

The spelling of 138161510 in words is "one hundred thirty-eight million, one hundred sixty-one thousand, five hundred ten".