11780708787 has 12 divisors (see below), whose sum is σ = 17028423360. Its totient is φ = 7848339408.

The previous prime is 11780708783. The next prime is 11780708837. The reversal of 11780708787 is 78780708711.

It is not a de Polignac number, because 11780708787 - 2² = 11780708783 is a prime.

It is a super-2 number, since 2×11780708787² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11780708783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441868 + ... + 467769.

It is an arithmetic number, because the mean of its divisors is an integer number (1419035280).

Almost surely, 2^11780708787 is an apocalyptic number.

11780708787 is a deficient number, since it is larger than the sum of its proper divisors (5247714573).

11780708787 is a wasteful number, since it uses less digits than its factorization.

11780708787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911082 (or 911079 counting only the distinct ones).

The product of its (nonzero) digits is 1229312, while the sum is 54.

The spelling of 11780708787 in words is "eleven billion, seven hundred eighty million, seven hundred eight thousand, seven hundred eighty-seven".