10661251156 has 12 divisors (see below), whose sum is σ = 19112243220. Its totient is φ = 5200610240.

The previous prime is 10661251103. The next prime is 10661251163. The reversal of 10661251156 is 65115216601.

It can be written as a sum of positive squares in 2 ways, for example, as 1045487556 + 9615763600 = 32334^2 + 98060^2 .

It is a super-2 number, since 2×10661251156² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32503651 + ... + 32503978.

It is an arithmetic number, because the mean of its divisors is an integer number (1592686935).

Almost surely, 2^10661251156 is an apocalyptic number.

It is an amenable number.

10661251156 is a deficient number, since it is larger than the sum of its proper divisors (8450992064).

10661251156 is a wasteful number, since it uses less digits than its factorization.

10661251156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65007674 (or 65007672 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

Adding to 10661251156 its reverse (65115216601), we get a palindrome (75776467757).

The spelling of 10661251156 in words is "ten billion, six hundred sixty-one million, two hundred fifty-one thousand, one hundred fifty-six".