156421068 has 72 divisors (see below), whose sum is σ = 391497456. Its totient is φ = 48576000.

The previous prime is 156421043. The next prime is 156421103. The reversal of 156421068 is 860124651.

156421068 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, 259968 + ... + 260568.

Almost surely, 2^156421068 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 156421068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195748728).

156421068 is an abundant number, since it is smaller than the sum of its proper divisors (235076388).

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

156421068 is a wasteful number, since it uses less digits than its factorization.

156421068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 156421068 is about 12506.8408481119. The cubic root of 156421068 is about 538.8051633949.

The spelling of 156421068 in words is "one hundred fifty-six million, four hundred twenty-one thousand, sixty-eight".