1541326644 has 216 divisors, whose sum is σ = 4778478432. Its totient is φ = 430634880.

The previous prime is 1541326637. The next prime is 1541326681. The reversal of 1541326644 is 4466231451.

1541326644 is a `hidden beast` number, since 1 + 5 + 4 + 1 + 3 + 2 + 6 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1541326599 and 1541326608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1806522 + ... + 1807374.

Almost surely, 2^1541326644 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 1541326644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2389239216).

1541326644 is an abundant number, since it is smaller than the sum of its proper divisors (3237151788).

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

1541326644 is a wasteful number, since it uses less digits than its factorization.

1541326644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 882 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1541326644 is about 39259.7331116756. The cubic root of 1541326644 is about 1155.1318587864.

The spelling of 1541326644 in words is "one billion, five hundred forty-one million, three hundred twenty-six thousand, six hundred forty-four".