1553135874 has 8 divisors (see below), whose sum is σ = 3106271760. Its totient is φ = 517711956.

The previous prime is 1553135839. The next prime is 1553135879. The reversal of 1553135874 is 4785313551.

It is a sphenic number, since it is the product of 3 distinct primes.

1553135874 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1553135879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129427984 + ... + 129427995.

It is an arithmetic number, because the mean of its divisors is an integer number (388283970).

Almost surely, 2^1553135874 is an apocalyptic number.

1553135874 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1553135874 is a wasteful number, since it uses less digits than its factorization.

1553135874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258855984.

The product of its digits is 252000, while the sum is 42.

The square root of 1553135874 is about 39409.8448867792. The cubic root of 1553135874 is about 1158.0744595527.

The spelling of 1553135874 in words is "one billion, five hundred fifty-three million, one hundred thirty-five thousand, eight hundred seventy-four".