11287787536 has 15 divisors (see below), whose sum is σ = 21870911773. Its totient is φ = 5643681280.

The previous prime is 11287787503. The next prime is 11287787557. The reversal of 11287787536 is 63578778211.

The square root of 11287787536 is 106244.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9713285136 + 1574502400 = 98556^2 + 39680^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 411696 + ... + 438256.

Almost surely, 2^11287787536 is an apocalyptic number.

11287787536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

11287787536 is the 106244-th square number.

It is an amenable number.

11287787536 is a deficient number, since it is larger than the sum of its proper divisors (10583124237).

11287787536 is an frugal number, since it uses more digits than its factorization.

11287787536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53130 (or 26563 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 55.

The spelling of 11287787536 in words is "eleven billion, two hundred eighty-seven million, seven hundred eighty-seven thousand, five hundred thirty-six".