1011661141 has 16 divisors (see below), whose sum is σ = 1102608000. Its totient is φ = 925518528.

The previous prime is 1011661103. The next prime is 1011661151. The reversal of 1011661141 is 1411661101.

It is a happy number.

It is not a de Polignac number, because 1011661141 - 2¹⁹ = 1011136853 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 40135 + ... + 60283.

It is an arithmetic number, because the mean of its divisors is an integer number (68913000).

Almost surely, 2^1011661141 is an apocalyptic number.

It is an amenable number.

1011661141 is a deficient number, since it is larger than the sum of its proper divisors (90946859).

1011661141 is a wasteful number, since it uses less digits than its factorization.

1011661141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20268.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1011661141 is about 31806.6210245603. The cubic root of 1011661141 is about 1003.8720349943.

The spelling of 1011661141 in words is "one billion, eleven million, six hundred sixty-one thousand, one hundred forty-one".