1550379644 has 24 divisors (see below), whose sum is σ = 2993079600. Its totient is φ = 696798080.

The previous prime is 1550379641. The next prime is 1550379667. The reversal of 1550379644 is 4469730551.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1550379595 and 1550379604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550379641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194039 + ... + 201870.

It is an arithmetic number, because the mean of its divisors is an integer number (124711650).

Almost surely, 2^1550379644 is an apocalyptic number.

It is an amenable number.

1550379644 is a deficient number, since it is larger than the sum of its proper divisors (1442699956).

1550379644 is a wasteful number, since it uses less digits than its factorization.

1550379644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396013 (or 396011 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 1550379644 is about 39374.8605584833. The cubic root of 1550379644 is about 1157.3890055548.

The spelling of 1550379644 in words is "one billion, five hundred fifty million, three hundred seventy-nine thousand, six hundred forty-four".