11156989970 has 32 divisors (see below), whose sum is σ = 23002704000. Its totient is φ = 3816723456.

The previous prime is 11156989957. The next prime is 11156989979. The reversal of 11156989970 is 7998965111.

It is not an unprimeable number, because it can be changed into a prime (11156989979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146060 + ... + 208919.

It is an arithmetic number, because the mean of its divisors is an integer number (718834500).

Almost surely, 2^11156989970 is an apocalyptic number.

11156989970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11156989970 is an abundant number, since it is smaller than the sum of its proper divisors (11845714030).

11156989970 is a wasteful number, since it uses less digits than its factorization.

11156989970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355442.

The product of its (nonzero) digits is 1224720, while the sum is 56.

The spelling of 11156989970 in words is "eleven billion, one hundred fifty-six million, nine hundred eighty-nine thousand, nine hundred seventy".