156506427561 has 8 divisors (see below), whose sum is σ = 227645712864. Its totient is φ = 94852380320.

The previous prime is 156506427557. The next prime is 156506427607. The reversal of 156506427561 is 165724605651.

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 156506427561 - 2² = 156506427557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 156506427561.

It is not an unprimeable number, because it can be changed into a prime (156506427521) by changing a digit.

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, 2371309476 + ... + 2371309541.

It is an arithmetic number, because the mean of its divisors is an integer number (28455714108).

Almost surely, 2^156506427561 is an apocalyptic number.

156506427561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

156506427561 is a deficient number, since it is larger than the sum of its proper divisors (71139285303).

156506427561 is a wasteful number, since it uses less digits than its factorization.

156506427561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742619031.

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 156506427561 in words is "one hundred fifty-six billion, five hundred six million, four hundred twenty-seven thousand, five hundred sixty-one".