1554163380 has 432 divisors, whose sum is σ = 6085969344. Its totient is φ = 317399040.

The previous prime is 1554163363. The next prime is 1554163381. The reversal of 1554163380 is 833614551.

1554163380 is a `hidden beast` number, since 1 + 5 + 541 + 6 + 33 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1554163381) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8052564 + ... + 8052756.

It is an arithmetic number, because the mean of its divisors is an integer number (14087892).

Almost surely, 2^1554163380 is an apocalyptic number.

1554163380 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 1554163380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3042984672).

1554163380 is an abundant number, since it is smaller than the sum of its proper divisors (4531805964).

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

1554163380 is a wasteful number, since it uses less digits than its factorization.

1554163380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1554163380 is about 39422.8788903094. The cubic root of 1554163380 is about 1158.3297851739.

The spelling of 1554163380 in words is "one billion, five hundred fifty-four million, one hundred sixty-three thousand, three hundred eighty".