11487871784 has 8 divisors (see below), whose sum is σ = 21539759610. Its totient is φ = 5743935888.

The previous prime is 11487871763. The next prime is 11487871793. The reversal of 11487871784 is 48717878411.

It can be written as a sum of positive squares in only one way, i.e., 8982869284 + 2505002500 = 94778^2 + 50050^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 717991979 + ... + 717991994.

Almost surely, 2^11487871784 is an apocalyptic number.

It is an amenable number.

11487871784 is a deficient number, since it is larger than the sum of its proper divisors (10051887826).

11487871784 is a wasteful number, since it uses less digits than its factorization.

11487871784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435983979 (or 1435983975 counting only the distinct ones).

The product of its digits is 2809856, while the sum is 56.

The spelling of 11487871784 in words is "eleven billion, four hundred eighty-seven million, eight hundred seventy-one thousand, seven hundred eighty-four".