156641004 has 72 divisors (see below), whose sum is σ = 428828400. Its totient is φ = 47924352.

The previous prime is 156640999. The next prime is 156641011. The reversal of 156641004 is 400146651.

156641004 is a `hidden beast` number, since 15 + 6 + 641 + 0 + 0 + 4 = 666.

156641004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91347 + ... + 93045.

It is an arithmetic number, because the mean of its divisors is an integer number (5955950).

Almost surely, 2^156641004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156641004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214414200).

156641004 is an abundant number, since it is smaller than the sum of its proper divisors (272187396).

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

156641004 is a wasteful number, since it uses less digits than its factorization.

156641004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919 (or 1914 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 156641004 is about 12515.6303876393. The cubic root of 156641004 is about 539.0575743116.

Adding to 156641004 its reverse (400146651), we get a palindrome (556787655).

The spelling of 156641004 in words is "one hundred fifty-six million, six hundred forty-one thousand, four".