1987144780532 has 12 divisors (see below), whose sum is σ = 3477541974816. Its totient is φ = 993561359160.

The previous prime is 1987144780501. The next prime is 1987144780553. The reversal of 1987144780532 is 2350874417891.

It is a happy number.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 2345618 + ... + 3078345.

It is an arithmetic number, because the mean of its divisors is an integer number (289795164568).

Almost surely, 2^{1987144780532} is an apocalyptic number.

It is an amenable number.

1987144780532 is a deficient number, since it is larger than the sum of its proper divisors (1490397194284).

1987144780532 is a wasteful number, since it uses less digits than its factorization.

1987144780532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5515558 (or 5515556 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 1987144780532 in words is "one trillion, nine hundred eighty-seven billion, one hundred forty-four million, seven hundred eighty thousand, five hundred thirty-two".