1542881680 has 20 divisors (see below), whose sum is σ = 3587200092. Its totient is φ = 617152640.

The previous prime is 1542881671. The next prime is 1542881707. The reversal of 1542881680 is 861882451.

It can be written as a sum of positive squares in 2 ways, for example, as 358420624 + 1184461056 = 18932^2 + 34416^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9642931 + ... + 9643090.

Almost surely, 2^1542881680 is an apocalyptic number.

1542881680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1542881680 is an abundant number, since it is smaller than the sum of its proper divisors (2044318412).

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

1542881680 is a wasteful number, since it uses less digits than its factorization.

1542881680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19286034 (or 19286028 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 1542881680 is about 39279.5325837770. The cubic root of 1542881680 is about 1155.5201969512.

The spelling of 1542881680 in words is "one billion, five hundred forty-two million, eight hundred eighty-one thousand, six hundred eighty".