1550140540 has 96 divisors (see below), whose sum is σ = 3647641536. Its totient is φ = 549642240.

The previous prime is 1550140531. The next prime is 1550140541. The reversal of 1550140540 is 450410551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550140541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 680844 + ... + 683116.

It is an arithmetic number, because the mean of its divisors is an integer number (37996266).

Almost surely, 2^1550140540 is an apocalyptic number.

1550140540 is a gapful number since it is divisible by the number (10) 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 1550140540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1823820768).

1550140540 is an abundant number, since it is smaller than the sum of its proper divisors (2097500996).

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

1550140540 is a wasteful number, since it uses less digits than its factorization.

1550140540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399 (or 2397 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1550140540 is about 39371.8241893870. The cubic root of 1550140540 is about 1157.3295038774.

The spelling of 1550140540 in words is "one billion, five hundred fifty million, one hundred forty thousand, five hundred forty".