1542566556 has 72 divisors (see below), whose sum is σ = 4046274960. Its totient is φ = 495092736.

The previous prime is 1542566551. The next prime is 1542566567. The reversal of 1542566556 is 6556652451.

1542566556 is a `hidden beast` number, since 1 + 5 + 42 + 56 + 6 + 556 = 666.

It is a super-2 number, since 2×1542566556² = 4759023159379402272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542566551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123235 + ... + 135173.

Almost surely, 2^1542566556 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 1542566556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023137480).

1542566556 is an abundant number, since it is smaller than the sum of its proper divisors (2503708404).

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

1542566556 is a wasteful number, since it uses less digits than its factorization.

1542566556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12083 (or 12078 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The square root of 1542566556 is about 39275.5210786566. The cubic root of 1542566556 is about 1155.4415223203.

The spelling of 1542566556 in words is "one billion, five hundred forty-two million, five hundred sixty-six thousand, five hundred fifty-six".