156542442261 has 8 divisors (see below), whose sum is σ = 208731620064. Its totient is φ = 104357446320.

The previous prime is 156542442257. The next prime is 156542442299. The reversal of 156542442261 is 162244245651.

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

It is not a de Polignac number, because 156542442261 - 2² = 156542442257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156542492261) 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, 957051 + ... + 1108616.

It is an arithmetic number, because the mean of its divisors is an integer number (26091452508).

Almost surely, 2^156542442261 is an apocalyptic number.

It is an amenable number.

156542442261 is a deficient number, since it is larger than the sum of its proper divisors (52189177803).

156542442261 is a wasteful number, since it uses less digits than its factorization.

156542442261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090931.

The product of its digits is 460800, while the sum is 42.

The spelling of 156542442261 in words is "one hundred fifty-six billion, five hundred forty-two million, four hundred forty-two thousand, two hundred sixty-one".