1553358397860 has 144 divisors (see below), whose sum is σ = 4770426548160. Its totient is φ = 409083436800.

The previous prime is 1553358397859. The next prime is 1553358397933. The reversal of 1553358397860 is 687938533551.

It is a happy number.

1553358397860 is a `hidden beast` number, since 1 + 5 + 533 + 5 + 8 + 3 + 97 + 8 + 6 + 0 = 666.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 42575706 + ... + 42612174.

It is an arithmetic number, because the mean of its divisors is an integer number (33127962140).

Almost surely, 2^{1553358397860} is an apocalyptic number.

1553358397860 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 1553358397860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2385213274080).

1553358397860 is an abundant number, since it is smaller than the sum of its proper divisors (3217068150300).

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

1553358397860 is a wasteful number, since it uses less digits than its factorization.

1553358397860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39418 (or 39413 counting only the distinct ones).

The product of its (nonzero) digits is 81648000, while the sum is 63.

The spelling of 1553358397860 in words is "one trillion, five hundred fifty-three billion, three hundred fifty-eight million, three hundred ninety-seven thousand, eight hundred sixty".