5551236497665 has 16 divisors (see below), whose sum is σ = 6722385858000. Its totient is φ = 4400410642432.

The previous prime is 5551236497659. The next prime is 5551236497683. The reversal of 5551236497665 is 5667946321555.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3215006785936 + 2336229711729 = 1793044^2 + 1528473^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551236497665 - 2²¹ = 5551234400513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5551236497597 and 5551236497606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524331 + ... + 3373039.

It is an arithmetic number, because the mean of its divisors is an integer number (420149116125).

Almost surely, 2^{5551236497665} is an apocalyptic number.

It is an amenable number.

5551236497665 is a deficient number, since it is larger than the sum of its proper divisors (1171149360335).

5551236497665 is a wasteful number, since it uses less digits than its factorization.

5551236497665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852276.

The product of its digits is 204120000, while the sum is 64.

The spelling of 5551236497665 in words is "five trillion, five hundred fifty-one billion, two hundred thirty-six million, four hundred ninety-seven thousand, six hundred sixty-five".