1553340553240 has 256 divisors, whose sum is σ = 4454235878400. Its totient is φ = 474610876416.

The previous prime is 1553340553207. The next prime is 1553340553241. The reversal of 1553340553240 is 423550433551.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1553340553193 and 1553340553202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553340553241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 236678199 + ... + 236684761.

It is an arithmetic number, because the mean of its divisors is an integer number (17399358900).

Almost surely, 2^{1553340553240} is an apocalyptic number.

1553340553240 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 1553340553240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2227117939200).

1553340553240 is an abundant number, since it is smaller than the sum of its proper divisors (2900895325160).

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

1553340553240 is a wasteful number, since it uses less digits than its factorization.

1553340553240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9234 (or 9230 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 40.

Adding to 1553340553240 its reverse (423550433551), we get a palindrome (1976890986791).

The spelling of 1553340553240 in words is "one trillion, five hundred fifty-three billion, three hundred forty million, five hundred fifty-three thousand, two hundred forty".