1051661611 has 16 divisors (see below), whose sum is σ = 1412022528. Its totient is φ = 756439200.

The previous prime is 1051661561. The next prime is 1051661623. The reversal of 1051661611 is 1161661501.

It is not a de Polignac number, because 1051661611 - 2¹⁵ = 1051628843 is a prime.

It is a super-2 number, since 2×1051661611² = 2211984288102230642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1051661611.

It is not an unprimeable number, because it can be changed into a prime (1051661911) 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, 524305 + ... + 526306.

It is an arithmetic number, because the mean of its divisors is an integer number (88251408).

Almost surely, 2^1051661611 is an apocalyptic number.

1051661611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1051661611 is a deficient number, since it is larger than the sum of its proper divisors (360360917).

1051661611 is a wasteful number, since it uses less digits than its factorization.

1051661611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050642.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 1051661611 is about 32429.3325709920. The cubic root of 1051661611 is about 1016.9322188103.

It can be divided in two parts, 10516 and 61611, that added together give a palindrome (72127).

The spelling of 1051661611 in words is "one billion, fifty-one million, six hundred sixty-one thousand, six hundred eleven".