11950643738 has 32 divisors (see below), whose sum is σ = 20417260032. Its totient is φ = 5193025200.

The previous prime is 11950643737. The next prime is 11950643821. The reversal of 11950643738 is 83734605911.

It is a happy number.

It is a super-2 number, since 2×11950643738² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11950643692 and 11950643701.

It is not an unprimeable number, because it can be changed into a prime (11950643737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1072745 + ... + 1083827.

It is an arithmetic number, because the mean of its divisors is an integer number (638039376).

Almost surely, 2^11950643738 is an apocalyptic number.

11950643738 is a deficient number, since it is larger than the sum of its proper divisors (8466616294).

11950643738 is a wasteful number, since it uses less digits than its factorization.

11950643738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13250.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 11950643738 in words is "eleven billion, nine hundred fifty million, six hundred forty-three thousand, seven hundred thirty-eight".