156801128061 has 4 divisors (see below), whose sum is σ = 209068170752. Its totient is φ = 104534085372.

The previous prime is 156801128059. The next prime is 156801128063. The reversal of 156801128061 is 160821108651.

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 an interprime number because it is at equal distance from previous prime (156801128059) and next prime (156801128063).

It is not a de Polignac number, because 156801128061 - 2¹ = 156801128059 is a prime.

It is a super-2 number, since 2×156801128061² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156801128063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26133521341 + ... + 26133521346.

It is an arithmetic number, because the mean of its divisors is an integer number (52267042688).

Almost surely, 2^156801128061 is an apocalyptic number.

It is an amenable number.

156801128061 is a deficient number, since it is larger than the sum of its proper divisors (52267042691).

156801128061 is an equidigital number, since it uses as much as digits as its factorization.

156801128061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52267042690.

The product of its (nonzero) digits is 23040, while the sum is 39.

The spelling of 156801128061 in words is "one hundred fifty-six billion, eight hundred one million, one hundred twenty-eight thousand, sixty-one".