1642737544 has 96 divisors (see below), whose sum is σ = 3751035480. Its totient is φ = 671763456.

The previous prime is 1642737541. The next prime is 1642737559. The reversal of 1642737544 is 4457372461.

It can be written as a sum of positive squares in 4 ways, for example, as 1463980644 + 178756900 = 38262^2 + 13370^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1642737544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642737541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 767644 + ... + 769780.

Almost surely, 2^1642737544 is an apocalyptic number.

1642737544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642737544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1875517740).

1642737544 is an abundant number, since it is smaller than the sum of its proper divisors (2108297936).

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

1642737544 is a wasteful number, since it uses less digits than its factorization.

1642737544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247 (or 2236 counting only the distinct ones).

The product of its digits is 564480, while the sum is 43.

The square root of 1642737544 is about 40530.6987849951. The cubic root of 1642737544 is about 1179.9295045504.

The spelling of 1642737544 in words is "one billion, six hundred forty-two million, seven hundred thirty-seven thousand, five hundred forty-four".