1141981656 has 32 divisors (see below), whose sum is σ = 2891097600. Its totient is φ = 375841440.

The previous prime is 1141981609. The next prime is 1141981657. The reversal of 1141981656 is 6561891411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1141981657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299260 + ... + 303051.

It is an arithmetic number, because the mean of its divisors is an integer number (90346800).

Almost surely, 2^1141981656 is an apocalyptic number.

It is an amenable number.

1141981656 is an abundant number, since it is smaller than the sum of its proper divisors (1749115944).

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

1141981656 is a wasteful number, since it uses less digits than its factorization.

1141981656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602399 (or 602395 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The square root of 1141981656 is about 33793.2190831238. The cubic root of 1141981656 is about 1045.2488761108.

The spelling of 1141981656 in words is "one billion, one hundred forty-one million, nine hundred eighty-one thousand, six hundred fifty-six".