155601604001 has 8 divisors (see below), whose sum is σ = 156697536744. Its totient is φ = 154507930240.

The previous prime is 155601603991. The next prime is 155601604063. The reversal of 155601604001 is 100406106551.

It can be written as a sum of positive squares in 4 ways, for example, as 79270965601 + 76330638400 = 281551^2 + 276280^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155601604001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155601604091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426380 + ... + 702141.

It is an arithmetic number, because the mean of its divisors is an integer number (19587192093).

Almost surely, 2^155601604001 is an apocalyptic number.

It is an amenable number.

155601604001 is a deficient number, since it is larger than the sum of its proper divisors (1095932743).

155601604001 is a wasteful number, since it uses less digits than its factorization.

155601604001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129491.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 155601604001 in words is "one hundred fifty-five billion, six hundred one million, six hundred four thousand, one".