154771956 has 36 divisors (see below), whose sum is σ = 404722500. Its totient is φ = 49811328.

The previous prime is 154771951. The next prime is 154771957. The reversal of 154771956 is 659177451.

154771956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 58064400 + 96707556 = 7620^2 + 9834^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154771951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73081 + ... + 75168.

Almost surely, 2^154771956 is an apocalyptic number.

It is an amenable number.

154771956 is an abundant number, since it is smaller than the sum of its proper divisors (249950544).

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

154771956 is a wasteful number, since it uses less digits than its factorization.

154771956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148288 (or 148283 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 154771956 is about 12440.7377594739. The cubic root of 154771956 is about 536.9049695035.

The spelling of 154771956 in words is "one hundred fifty-four million, seven hundred seventy-one thousand, nine hundred fifty-six".