1011661154 has 12 divisors (see below), whose sum is σ = 1765245654. Its totient is φ = 433569024.

The previous prime is 1011661153. The next prime is 1011661199. The reversal of 1011661154 is 4511661101.

1011661154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 997106929 + 14554225 = 31577^2 + 3815^2 .

It is a super-2 number, since 2×1011661154² = 2046916581025223432, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1011661151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5161439 + ... + 5161634.

Almost surely, 2^1011661154 is an apocalyptic number.

1011661154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1011661154 is a deficient number, since it is larger than the sum of its proper divisors (753584500).

1011661154 is a wasteful number, since it uses less digits than its factorization.

1011661154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10323089 (or 10323082 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1011661154 is about 31806.6212289202. The cubic root of 1011661154 is about 1003.8720392943.

The spelling of 1011661154 in words is "one billion, eleven million, six hundred sixty-one thousand, one hundred fifty-four".