1487781270820 has 96 divisors (see below), whose sum is σ = 3498202229760. Its totient is φ = 527789191680.

The previous prime is 1487781270799. The next prime is 1487781270869. The reversal of 1487781270820 is 280721877841.

It is a happy 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, 456354 + ... + 1784326.

It is an arithmetic number, because the mean of its divisors is an integer number (36439606560).

Almost surely, 2^{1487781270820} is an apocalyptic number.

1487781270820 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 1487781270820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749101114880).

1487781270820 is an abundant number, since it is smaller than the sum of its proper divisors (2010420958940).

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

1487781270820 is a wasteful number, since it uses less digits than its factorization.

1487781270820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328165 (or 1328163 counting only the distinct ones).

The product of its (nonzero) digits is 2809856, while the sum is 55.

The spelling of 1487781270820 in words is "one trillion, four hundred eighty-seven billion, seven hundred eighty-one million, two hundred seventy thousand, eight hundred twenty".