156105540 has 36 divisors (see below), whose sum is σ = 473520684. Its totient is φ = 41628096.

The previous prime is 156105533. The next prime is 156105559. The reversal of 156105540 is 45501651.

It is a happy number.

156105540 is a `hidden beast` number, since 1 + 5 + 610 + 5 + 5 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27373824 + 128731716 = 5232^2 + 11346^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 433447 + ... + 433806.

Almost surely, 2^156105540 is an apocalyptic number.

156105540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156105540 is an abundant number, since it is smaller than the sum of its proper divisors (317415144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156105540 is a wasteful number, since it uses less digits than its factorization.

156105540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867268 (or 867263 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 156105540 is about 12494.2202637860. The cubic root of 156105540 is about 538.4426321881.

The spelling of 156105540 in words is "one hundred fifty-six million, one hundred five thousand, five hundred forty".