1553003540 has 72 divisors (see below), whose sum is σ = 3594792096. Its totient is φ = 563147200.

The previous prime is 1553003537. The next prime is 1553003579. The reversal of 1553003540 is 453003551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1187567 + ... + 1188873.

It is an arithmetic number, because the mean of its divisors is an integer number (49927668).

Almost surely, 2^1553003540 is an apocalyptic number.

1553003540 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 1553003540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1797396048).

1553003540 is an abundant number, since it is smaller than the sum of its proper divisors (2041788556).

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

1553003540 is a wasteful number, since it uses less digits than its factorization.

1553003540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829 (or 1816 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 1553003540 is about 39408.1659050507. The cubic root of 1553003540 is about 1158.0415676079.

The spelling of 1553003540 in words is "one billion, five hundred fifty-three million, three thousand, five hundred forty".