151643646 has 192 divisors, whose sum is σ = 439934976. Its totient is φ = 36590400.

The previous prime is 151643633. The next prime is 151643647. The reversal of 151643646 is 646346151.

It is a happy number.

151643646 is a `hidden beast` number, since 1 + 5 + 1 + 6 + 4 + 3 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 151643646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151643647) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2135791 + ... + 2135861.

It is an arithmetic number, because the mean of its divisors is an integer number (2291328).

Almost surely, 2^151643646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 151643646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219967488).

151643646 is an abundant number, since it is smaller than the sum of its proper divisors (288291330).

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

151643646 is a wasteful number, since it uses less digits than its factorization.

151643646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 184 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 151643646 is about 12314.3674624400. The cubic root of 151643646 is about 533.2629439222.

Adding to 151643646 its reverse (646346151), we get a palindrome (797989797).

The spelling of 151643646 in words is "one hundred fifty-one million, six hundred forty-three thousand, six hundred forty-six".