11902967578 has 4 divisors (see below), whose sum is σ = 17854451370. Its totient is φ = 5951483788.

The previous prime is 11902967569. The next prime is 11902967579. The reversal of 11902967578 is 87576920911.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6276917529 + 5626050049 = 79227^2 + 75007^2 .

It is not an unprimeable number, because it can be changed into a prime (11902967579) 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 as a sum of consecutive naturals, namely, 2975741893 + ... + 2975741896.

Almost surely, 2^11902967578 is an apocalyptic number.

11902967578 is a deficient number, since it is larger than the sum of its proper divisors (5951483792).

11902967578 is an equidigital number, since it uses as much as digits as its factorization.

11902967578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5951483791.

The product of its (nonzero) digits is 1905120, while the sum is 55.

The spelling of 11902967578 in words is "eleven billion, nine hundred two million, nine hundred sixty-seven thousand, five hundred seventy-eight".