1553025798 has 80 divisors (see below), whose sum is σ = 3614765616. Its totient is φ = 497975040.

The previous prime is 1553025739. The next prime is 1553025811. The reversal of 1553025798 is 8975203551.

1553025798 is a `hidden beast` number, since 1 + 5 + 530 + 25 + 7 + 98 = 666.

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 39 ways as a sum of consecutive naturals, for example, 483265 + ... + 486467.

Almost surely, 2^1553025798 is an apocalyptic number.

1553025798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1553025798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1807382808).

1553025798 is an abundant number, since it is smaller than the sum of its proper divisors (2061739818).

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

1553025798 is a wasteful number, since it uses less digits than its factorization.

1553025798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331 (or 3322 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 1553025798 is about 39408.4483074378. The cubic root of 1553025798 is about 1158.0471000199.

It can be divided in two parts, 15530 and 25798, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 1553025798 in words is "one billion, five hundred fifty-three million, twenty-five thousand, seven hundred ninety-eight".