11978070636 has 48 divisors (see below), whose sum is σ = 31978727424. Its totient is φ = 3418319616.

The previous prime is 11978070623. The next prime is 11978070653. The reversal of 11978070636 is 63607087911.

It is a happy number.

It is a super-2 number, since 2×11978070636² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 10125 + ... + 155108.

It is an arithmetic number, because the mean of its divisors is an integer number (666223488).

Almost surely, 2^11978070636 is an apocalyptic number.

It is an amenable number.

11978070636 is an abundant number, since it is smaller than the sum of its proper divisors (20000656788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11978070636 is a wasteful number, since it uses less digits than its factorization.

11978070636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166110 (or 166108 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 11978070636 in words is "eleven billion, nine hundred seventy-eight million, seventy thousand, six hundred thirty-six".