1551963798 has 96 divisors (see below), whose sum is σ = 4202295552. Its totient is φ = 402148800.

The previous prime is 1551963781. The next prime is 1551963799. The reversal of 1551963798 is 8973691551.

1551963798 is a `hidden beast` number, since 1 + 5 + 519 + 6 + 37 + 98 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551963799) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 723808 + ... + 725948.

It is an arithmetic number, because the mean of its divisors is an integer number (43773912).

Almost surely, 2^1551963798 is an apocalyptic number.

1551963798 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 1551963798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2101147776).

1551963798 is an abundant number, since it is smaller than the sum of its proper divisors (2650331754).

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

1551963798 is a wasteful number, since it uses less digits than its factorization.

1551963798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690 (or 2687 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 1551963798 is about 39394.9717349816. The cubic root of 1551963798 is about 1157.7830721112.

The spelling of 1551963798 in words is "one billion, five hundred fifty-one million, nine hundred sixty-three thousand, seven hundred ninety-eight".