156261245116261 has 16 divisors (see below), whose sum is σ = 163121127436800. Its totient is φ = 149515204608000.

The previous prime is 156261245116213. The next prime is 156261245116387. The reversal of 156261245116261 is 162611542162651.

It is a cyclic number.

It is not a de Polignac number, because 156261245116261 - 2²⁹ = 156260708245349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156261245116201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65538661 + ... + 67881061.

It is an arithmetic number, because the mean of its divisors is an integer number (10195070464800).

Almost surely, 2^{156261245116261} is an apocalyptic number.

It is an amenable number.

156261245116261 is a deficient number, since it is larger than the sum of its proper divisors (6859882320539).

156261245116261 is a wasteful number, since it uses less digits than its factorization.

156261245116261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366700.

The product of its digits is 1036800, while the sum is 49.

The spelling of 156261245116261 in words is "one hundred fifty-six trillion, two hundred sixty-one billion, two hundred forty-five million, one hundred sixteen thousand, two hundred sixty-one".