11747642787 has 54 divisors (see below), whose sum is σ = 18739133868. Its totient is φ = 7353047808.

The previous prime is 11747642773. The next prime is 11747642813. The reversal of 11747642787 is 78724674711.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

11747642787 is a `hidden beast` number, since 1 + 1 + 74 + 76 + 427 + 87 = 666.

It is not a de Polignac number, because 11747642787 - 2⁶ = 11747642723 is a prime.

It is a super-2 number, since 2×11747642787² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11747642707) by changing a digit.

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 53 ways as a sum of consecutive naturals, for example, 28722639 + ... + 28723047.

Almost surely, 2^11747642787 is an apocalyptic number.

11747642787 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11747642787 is a deficient number, since it is larger than the sum of its proper divisors (6991491081).

11747642787 is an frugal number, since it uses more digits than its factorization.

11747642787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 429 counting only the distinct ones).

The product of its digits is 3687936, while the sum is 54.

The spelling of 11747642787 in words is "eleven billion, seven hundred forty-seven million, six hundred forty-two thousand, seven hundred eighty-seven".