1553381004 has 48 divisors (see below), whose sum is σ = 4146464000. Its totient is φ = 443382336.

The previous prime is 1553380987. The next prime is 1553381009. The reversal of 1553381004 is 4001833551.

It is not an unprimeable number, because it can be changed into a prime (1553381009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81147 + ... + 98445.

Almost surely, 2^1553381004 is an apocalyptic number.

1553381004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1553381004 is an abundant number, since it is smaller than the sum of its proper divisors (2593082996).

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

1553381004 is a wasteful number, since it uses less digits than its factorization.

1553381004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18382 (or 18380 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1553381004 is about 39412.9547737796. The cubic root of 1553381004 is about 1158.1353822884.

The spelling of 1553381004 in words is "one billion, five hundred fifty-three million, three hundred eighty-one thousand, four".