156540261 has 8 divisors (see below), whose sum is σ = 209927520. Its totient is φ = 103756592.

The previous prime is 156540257. The next prime is 156540269. The reversal of 156540261 is 162045651.

156540261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 156540261 - 2² = 156540257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156540269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150291 + ... + 151328.

It is an arithmetic number, because the mean of its divisors is an integer number (26240940).

Almost surely, 2^156540261 is an apocalyptic number.

It is an amenable number.

156540261 is a deficient number, since it is larger than the sum of its proper divisors (53387259).

156540261 is a wasteful number, since it uses less digits than its factorization.

156540261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301795.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 156540261 is about 12511.6050529099. The cubic root of 156540261 is about 538.9419853273.

The spelling of 156540261 in words is "one hundred fifty-six million, five hundred forty thousand, two hundred sixty-one".