1553487642 has 96 divisors (see below), whose sum is σ = 4084359552. Its totient is φ = 416581632.

The previous prime is 1553487601. The next prime is 1553487647. The reversal of 1553487642 is 2467843551.

1553487642 is a `hidden beast` number, since 1 + 5 + 534 + 8 + 76 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (1553487647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 999538 + ... + 1001090.

It is an arithmetic number, because the mean of its divisors is an integer number (42545412).

Almost surely, 2^1553487642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1553487642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2042179776).

1553487642 is an abundant number, since it is smaller than the sum of its proper divisors (2530871910).

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

1553487642 is a wasteful number, since it uses less digits than its factorization.

1553487642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2049 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 1553487642 is about 39414.3075798624. The cubic root of 1553487642 is about 1158.1618832808.

The spelling of 1553487642 in words is "one billion, five hundred fifty-three million, four hundred eighty-seven thousand, six hundred forty-two".