1601000156 has 24 divisors (see below), whose sum is σ = 3204321120. Its totient is φ = 685645632.

The previous prime is 1601000153. The next prime is 1601000161. The reversal of 1601000156 is 6510001061.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601000153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20006 + ... + 60018.

It is an arithmetic number, because the mean of its divisors is an integer number (133513380).

Almost surely, 2^1601000156 is an apocalyptic number.

It is a pronic number, being equal to 40012×40013.

It is an amenable number.

1601000156 is an abundant number, since it is smaller than the sum of its proper divisors (1603320964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601000156 is a wasteful number, since it uses less digits than its factorization.

1601000156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41453 (or 41451 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1601000156 is about 40012.4999968760. The cubic root of 1601000156 is about 1169.8507506798.

The spelling of 1601000156 in words is "one billion, six hundred one million, one hundred fifty-six", and thus it is an aban number.