1542143556 has 96 divisors (see below), whose sum is σ = 4198320000. Its totient is φ = 488847744.

The previous prime is 1542143543. The next prime is 1542143563. The reversal of 1542143556 is 6553412451.

1542143556 is a `hidden beast` number, since 154 + 21 + 435 + 56 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1542143556.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206170 + ... + 213518.

It is an arithmetic number, because the mean of its divisors is an integer number (43732500).

Almost surely, 2^1542143556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1542143556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2099160000).

1542143556 is an abundant number, since it is smaller than the sum of its proper divisors (2656176444).

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

1542143556 is a wasteful number, since it uses less digits than its factorization.

1542143556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458 (or 7450 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 1542143556 is about 39270.1356758542. The cubic root of 1542143556 is about 1155.3358982564.

The spelling of 1542143556 in words is "one billion, five hundred forty-two million, one hundred forty-three thousand, five hundred fifty-six".