10551665650 has 24 divisors (see below), whose sum is σ = 19650433140. Its totient is φ = 4215432960.

The previous prime is 10551665647. The next prime is 10551665653. The reversal of 10551665650 is 5656615501.

It is an interprime number because it is at equal distance from previous prime (10551665647) and next prime (10551665653).

It can be written as a sum of positive squares in 6 ways, for example, as 5410632249 + 5141033401 = 73557^2 + 71701^2 .

It is a super-2 number, since 2×10551665650² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10551665653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89979 + ... + 170878.

Almost surely, 2^10551665650 is an apocalyptic number.

10551665650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10551665650 is a deficient number, since it is larger than the sum of its proper divisors (9098767490).

10551665650 is a wasteful number, since it uses less digits than its factorization.

10551665650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261678 (or 261673 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 10551665650 in words is "ten billion, five hundred fifty-one million, six hundred sixty-five thousand, six hundred fifty".