156705226202001 has 4 divisors (see below), whose sum is σ = 208940301602672. Its totient is φ = 104470150801332.

The previous prime is 156705226201943. The next prime is 156705226202003. The reversal of 156705226202001 is 100202622507651.

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 not a de Polignac number, because 156705226202001 - 2⁷ = 156705226201873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156705226202003) 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, 26117537700331 + ... + 26117537700336.

It is an arithmetic number, because the mean of its divisors is an integer number (52235075400668).

Almost surely, 2^{156705226202001} is an apocalyptic number.

It is an amenable number.

156705226202001 is a deficient number, since it is larger than the sum of its proper divisors (52235075400671).

156705226202001 is an equidigital number, since it uses as much as digits as its factorization.

156705226202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52235075400670.

The product of its (nonzero) digits is 100800, while the sum is 39.

Adding to 156705226202001 its reverse (100202622507651), we get a palindrome (256907848709652).

The spelling of 156705226202001 in words is "one hundred fifty-six trillion, seven hundred five billion, two hundred twenty-six million, two hundred two thousand, one".