11640126778 has 32 divisors (see below), whose sum is σ = 20650320000. Its totient is φ = 4814800704.

The previous prime is 11640126761. The next prime is 11640126793. The reversal of 11640126778 is 87762104611.

It is a super-2 number, since 2×11640126778² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2021848 + ... + 2027596.

It is an arithmetic number, because the mean of its divisors is an integer number (645322500).

Almost surely, 2^11640126778 is an apocalyptic number.

11640126778 is a deficient number, since it is larger than the sum of its proper divisors (9010193222).

11640126778 is a wasteful number, since it uses less digits than its factorization.

11640126778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10774.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 11640126778 in words is "eleven billion, six hundred forty million, one hundred twenty-six thousand, seven hundred seventy-eight".