145681956 has 96 divisors (see below), whose sum is σ = 435240960. Its totient is φ = 41277600.

The previous prime is 145681933. The next prime is 145681961. The reversal of 145681956 is 659186541.

145681956 is a `hidden beast` number, since 1 + 456 + 8 + 195 + 6 = 666.

145681956 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 31 ways as a sum of consecutive naturals, for example, 98301 + ... + 99771.

It is an arithmetic number, because the mean of its divisors is an integer number (4533760).

Almost surely, 2^145681956 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 145681956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217620480).

145681956 is an abundant number, since it is smaller than the sum of its proper divisors (289559004).

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

145681956 is a wasteful number, since it uses less digits than its factorization.

145681956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1614 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 145681956 is about 12069.8780441229. The cubic root of 145681956 is about 526.1811122433.

The spelling of 145681956 in words is "one hundred forty-five million, six hundred eighty-one thousand, nine hundred fifty-six".