1011947564 has 12 divisors (see below), whose sum is σ = 1772001504. Its totient is φ = 505661424.

The previous prime is 1011947561. The next prime is 1011947569. The reversal of 1011947564 is 4657491101.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1011947561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70724 + ... + 83819.

It is an arithmetic number, because the mean of its divisors is an integer number (147666792).

Almost surely, 2^1011947564 is an apocalyptic number.

It is an amenable number.

1011947564 is a deficient number, since it is larger than the sum of its proper divisors (760053940).

1011947564 is a wasteful number, since it uses less digits than its factorization.

1011947564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156184 (or 156182 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1011947564 is about 31811.1232747289. The cubic root of 1011947564 is about 1003.9667653004.

The spelling of 1011947564 in words is "one billion, eleven million, nine hundred forty-seven thousand, five hundred sixty-four".