1542615540 has 96 divisors (see below), whose sum is σ = 4433425920. Its totient is φ = 400557696.

The previous prime is 1542615523. The next prime is 1542615553. The reversal of 1542615540 is 455162451.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1080307 + ... + 1081733.

It is an arithmetic number, because the mean of its divisors is an integer number (46181520).

Almost surely, 2^1542615540 is an apocalyptic number.

1542615540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1542615540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2216712960).

1542615540 is an abundant number, since it is smaller than the sum of its proper divisors (2890810380).

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

1542615540 is a wasteful number, since it uses less digits than its factorization.

1542615540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901 (or 1899 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 1542615540 is about 39276.1446682334. The cubic root of 1542615540 is about 1155.4537524892.

Adding to 1542615540 its reverse (455162451), we get a palindrome (1997777991).

The spelling of 1542615540 in words is "one billion, five hundred forty-two million, six hundred fifteen thousand, five hundred forty".