156220215226801 has 4 divisors (see below), whose sum is σ = 170422052974704. Its totient is φ = 142018377478900.

The previous prime is 156220215226783. The next prime is 156220215226861. The reversal of 156220215226801 is 108622512022651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 156220215226801 - 2²¹ = 156220213129649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156220215226861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7100918873935 + ... + 7100918873956.

It is an arithmetic number, because the mean of its divisors is an integer number (42605513243676).

Almost surely, 2^{156220215226801} is an apocalyptic number.

156220215226801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

156220215226801 is a deficient number, since it is larger than the sum of its proper divisors (14201837747903).

156220215226801 is a wasteful number, since it uses less digits than its factorization.

156220215226801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14201837747902.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 156220215226801 in words is "one hundred fifty-six trillion, two hundred twenty billion, two hundred fifteen million, two hundred twenty-six thousand, eight hundred one".