151644861 has 6 divisors (see below), whose sum is σ = 219042590. Its totient is φ = 101096568.

The previous prime is 151644847. The next prime is 151644863. The reversal of 151644861 is 168446151.

151644861 is a `hidden beast` number, since 1 + 5 + 1 + 644 + 8 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 149303961 + 2340900 = 12219^2 + 1530^2 .

It is not a de Polignac number, because 151644861 - 2⁶ = 151644797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151644863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8424706 + ... + 8424723.

Almost surely, 2^151644861 is an apocalyptic number.

It is an amenable number.

151644861 is a deficient number, since it is larger than the sum of its proper divisors (67397729).

151644861 is a wasteful number, since it uses less digits than its factorization.

151644861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16849435 (or 16849432 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 151644861 is about 12314.4167949603. The cubic root of 151644861 is about 533.2643681224.

The spelling of 151644861 in words is "one hundred fifty-one million, six hundred forty-four thousand, eight hundred sixty-one".