11978045642 has 8 divisors (see below), whose sum is σ = 17967656736. Its totient is φ = 5988826732.

The previous prime is 11978045627. The next prime is 11978045663. The reversal of 11978045642 is 24654087911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3428 + ... + 154815.

It is an arithmetic number, because the mean of its divisors is an integer number (2245957092).

Almost surely, 2^11978045642 is an apocalyptic number.

11978045642 is a deficient number, since it is larger than the sum of its proper divisors (5989611094).

11978045642 is a wasteful number, since it uses less digits than its factorization.

11978045642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196092.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 11978045642 in words is "eleven billion, nine hundred seventy-eight million, forty-five thousand, six hundred forty-two".