1061115511 has 4 divisors (see below), whose sum is σ = 1107250992. Its totient is φ = 1014980032.

The previous prime is 1061115499. The next prime is 1061115521. The reversal of 1061115511 is 1155111601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1061115511 - 2⁵ = 1061115479 is a prime.

It is a super-2 number, since 2×1061115511² = 2251932255369582242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061115521) 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, 23067706 + ... + 23067751.

It is an arithmetic number, because the mean of its divisors is an integer number (276812748).

Almost surely, 2^1061115511 is an apocalyptic number.

1061115511 is a deficient number, since it is larger than the sum of its proper divisors (46135481).

1061115511 is an equidigital number, since it uses as much as digits as its factorization.

1061115511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46135480.

The product of its (nonzero) digits is 150, while the sum is 22.

The square root of 1061115511 is about 32574.7680114533. The cubic root of 1061115511 is about 1019.9703666260.

The spelling of 1061115511 in words is "one billion, sixty-one million, one hundred fifteen thousand, five hundred eleven".